From 18850f6516c46c62c1c1ccffd4b570f1e7de7cef 2013-01-26 10:05:35
From: Matthias BUSSONNIER <bussonniermatthias@gmail.com>
Date: 2013-01-26 10:05:35
Subject: [PATCH] use less as a component

---

diff --git a/IPython/frontend/html/notebook/notebookapp.py b/IPython/frontend/html/notebook/notebookapp.py
index 362a966..8fb1d53 100644
--- a/IPython/frontend/html/notebook/notebookapp.py
+++ b/IPython/frontend/html/notebook/notebookapp.py
@@ -353,7 +353,11 @@ class NotebookApp(BaseIPythonApplication):
                        it. This is mainly convenient when working on the less
                        file to avoid a build step, or if user want to overwrite
                        some of the less variables without having to recompile
-                       everything.""")
+                       everything.
+                       
+                       You will need to install the less.js component in the static directory
+                       either in the source tree or in your profile folder.
+                       """)
 
     webapp_settings = Dict(config=True,
             help="Supply overrides for the tornado.web.Application that the "
diff --git a/IPython/frontend/html/notebook/static/js/less/LICENSE b/IPython/frontend/html/notebook/static/js/less/LICENSE
deleted file mode 100755
index 40f3b78..0000000
--- a/IPython/frontend/html/notebook/static/js/less/LICENSE
+++ /dev/null
@@ -1,179 +0,0 @@
-
-                              Apache License
-                        Version 2.0, January 2004
-                     http://www.apache.org/licenses/
-
-TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-1. Definitions.
-
-   "License" shall mean the terms and conditions for use, reproduction,
-   and distribution as defined by Sections 1 through 9 of this document.
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-   outstanding shares, or (iii) beneficial ownership of such entity.
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-   transformation or translation of a Source form, including but
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-   "Work" shall mean the work of authorship, whether in Source or
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-       wherever such third-party notices normally appear. The contents
-       of the NOTICE file are for informational purposes only and
-       do not modify the License. You may add Your own attribution
-       notices within Derivative Works that You distribute, alongside
-       or as an addendum to the NOTICE text from the Work, provided
-       that such additional attribution notices cannot be construed
-       as modifying the License.
-
-   You may add Your own copyright statement to Your modifications and
-   may provide additional or different license terms and conditions
-   for use, reproduction, or distribution of Your modifications, or
-   for any such Derivative Works as a whole, provided Your use,
-   reproduction, and distribution of the Work otherwise complies with
-   the conditions stated in this License.
-
-5. Submission of Contributions. Unless You explicitly state otherwise,
-   any Contribution intentionally submitted for inclusion in the Work
-   by You to the Licensor shall be under the terms and conditions of
-   this License, without any additional terms or conditions.
-   Notwithstanding the above, nothing herein shall supersede or modify
-   the terms of any separate license agreement you may have executed
-   with Licensor regarding such Contributions.
-
-6. Trademarks. This License does not grant permission to use the trade
-   names, trademarks, service marks, or product names of the Licensor,
-   except as required for reasonable and customary use in describing the
-   origin of the Work and reproducing the content of the NOTICE file.
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-7. Disclaimer of Warranty. Unless required by applicable law or
-   agreed to in writing, Licensor provides the Work (and each
-   Contributor provides its Contributions) on an "AS IS" BASIS,
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-   PARTICULAR PURPOSE. You are solely responsible for determining the
-   appropriateness of using or redistributing the Work and assume any
-   risks associated with Your exercise of permissions under this License.
-
-8. Limitation of Liability. In no event and under no legal theory,
-   whether in tort (including negligence), contract, or otherwise,
-   unless required by applicable law (such as deliberate and grossly
-   negligent acts) or agreed to in writing, shall any Contributor be
-   liable to You for damages, including any direct, indirect, special,
-   incidental, or consequential damages of any character arising as a
-   result of this License or out of the use or inability to use the
-   Work (including but not limited to damages for loss of goodwill,
-   work stoppage, computer failure or malfunction, or any and all
-   other commercial damages or losses), even if such Contributor
-   has been advised of the possibility of such damages.
-
-9. Accepting Warranty or Additional Liability. While redistributing
-   the Work or Derivative Works thereof, You may choose to offer,
-   and charge a fee for, acceptance of support, warranty, indemnity,
-   or other liability obligations and/or rights consistent with this
-   License. However, in accepting such obligations, You may act only
-   on Your own behalf and on Your sole responsibility, not on behalf
-   of any other Contributor, and only if You agree to indemnify,
-   defend, and hold each Contributor harmless for any liability
-   incurred by, or claims asserted against, such Contributor by reason
-   of your accepting any such warranty or additional liability.
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-END OF TERMS AND CONDITIONS
-
-Copyright (c) 2009-2010 Alexis Sellier
diff --git a/IPython/frontend/html/notebook/static/js/less/README b/IPython/frontend/html/notebook/static/js/less/README
deleted file mode 100644
index 252d751..0000000
--- a/IPython/frontend/html/notebook/static/js/less/README
+++ /dev/null
@@ -1,7 +0,0 @@
-Js files in this fomder from Tag 1.3.1 sha:68297d7e3850b5eedac825a202eb64f9c80ce183
-from
-https://github.com/cloudhead/less.js
-
-/dists/less-1.3.1.js
-/dists/less-1.3.1.min.js
-
diff --git a/IPython/frontend/html/notebook/static/js/less/less-1.3.1.js b/IPython/frontend/html/notebook/static/js/less/less-1.3.1.js
deleted file mode 100755
index 0d2a48c..0000000
--- a/IPython/frontend/html/notebook/static/js/less/less-1.3.1.js
+++ /dev/null
@@ -1,4011 +0,0 @@
-//
-// LESS - Leaner CSS v1.3.1
-// http://lesscss.org
-// 
-// Copyright (c) 2009-2011, Alexis Sellier
-// Licensed under the Apache 2.0 License.
-//
-(function (window, undefined) {
-//
-// Stub out `require` in the browser
-//
-function require(arg) {
-    return window.less[arg.split('/')[1]];
-};
-
-
-// ecma-5.js
-//
-// -- kriskowal Kris Kowal Copyright (C) 2009-2010 MIT License
-// -- tlrobinson Tom Robinson
-// dantman Daniel Friesen
-
-//
-// Array
-//
-if (!Array.isArray) {
-    Array.isArray = function(obj) {
-        return Object.prototype.toString.call(obj) === "[object Array]" ||
-               (obj instanceof Array);
-    };
-}
-if (!Array.prototype.forEach) {
-    Array.prototype.forEach =  function(block, thisObject) {
-        var len = this.length >>> 0;
-        for (var i = 0; i < len; i++) {
-            if (i in this) {
-                block.call(thisObject, this[i], i, this);
-            }
-        }
-    };
-}
-if (!Array.prototype.map) {
-    Array.prototype.map = function(fun /*, thisp*/) {
-        var len = this.length >>> 0;
-        var res = new Array(len);
-        var thisp = arguments[1];
-
-        for (var i = 0; i < len; i++) {
-            if (i in this) {
-                res[i] = fun.call(thisp, this[i], i, this);
-            }
-        }
-        return res;
-    };
-}
-if (!Array.prototype.filter) {
-    Array.prototype.filter = function (block /*, thisp */) {
-        var values = [];
-        var thisp = arguments[1];
-        for (var i = 0; i < this.length; i++) {
-            if (block.call(thisp, this[i])) {
-                values.push(this[i]);
-            }
-        }
-        return values;
-    };
-}
-if (!Array.prototype.reduce) {
-    Array.prototype.reduce = function(fun /*, initial*/) {
-        var len = this.length >>> 0;
-        var i = 0;
-
-        // no value to return if no initial value and an empty array
-        if (len === 0 && arguments.length === 1) throw new TypeError();
-
-        if (arguments.length >= 2) {
-            var rv = arguments[1];
-        } else {
-            do {
-                if (i in this) {
-                    rv = this[i++];
-                    break;
-                }
-                // if array contains no values, no initial value to return
-                if (++i >= len) throw new TypeError();
-            } while (true);
-        }
-        for (; i < len; i++) {
-            if (i in this) {
-                rv = fun.call(null, rv, this[i], i, this);
-            }
-        }
-        return rv;
-    };
-}
-if (!Array.prototype.indexOf) {
-    Array.prototype.indexOf = function (value /*, fromIndex */ ) {
-        var length = this.length;
-        var i = arguments[1] || 0;
-
-        if (!length)     return -1;
-        if (i >= length) return -1;
-        if (i < 0)       i += length;
-
-        for (; i < length; i++) {
-            if (!Object.prototype.hasOwnProperty.call(this, i)) { continue }
-            if (value === this[i]) return i;
-        }
-        return -1;
-    };
-}
-
-//
-// Object
-//
-if (!Object.keys) {
-    Object.keys = function (object) {
-        var keys = [];
-        for (var name in object) {
-            if (Object.prototype.hasOwnProperty.call(object, name)) {
-                keys.push(name);
-            }
-        }
-        return keys;
-    };
-}
-
-//
-// String
-//
-if (!String.prototype.trim) {
-    String.prototype.trim = function () {
-        return String(this).replace(/^\s\s*/, '').replace(/\s\s*$/, '');
-    };
-}
-var less, tree;
-
-if (typeof environment === "object" && ({}).toString.call(environment) === "[object Environment]") {
-    // Rhino
-    // Details on how to detect Rhino: https://github.com/ringo/ringojs/issues/88
-    if (typeof(window) === 'undefined') { less = {} }
-    else                                { less = window.less = {} }
-    tree = less.tree = {};
-    less.mode = 'rhino';
-} else if (typeof(window) === 'undefined') {
-    // Node.js
-    less = exports,
-    tree = require('./tree');
-    less.mode = 'node';
-} else {
-    // Browser
-    if (typeof(window.less) === 'undefined') { window.less = {} }
-    less = window.less,
-    tree = window.less.tree = {};
-    less.mode = 'browser';
-}
-//
-// less.js - parser
-//
-//    A relatively straight-forward predictive parser.
-//    There is no tokenization/lexing stage, the input is parsed
-//    in one sweep.
-//
-//    To make the parser fast enough to run in the browser, several
-//    optimization had to be made:
-//
-//    - Matching and slicing on a huge input is often cause of slowdowns.
-//      The solution is to chunkify the input into smaller strings.
-//      The chunks are stored in the `chunks` var,
-//      `j` holds the current chunk index, and `current` holds
-//      the index of the current chunk in relation to `input`.
-//      This gives us an almost 4x speed-up.
-//
-//    - In many cases, we don't need to match individual tokens;
-//      for example, if a value doesn't hold any variables, operations
-//      or dynamic references, the parser can effectively 'skip' it,
-//      treating it as a literal.
-//      An example would be '1px solid #000' - which evaluates to itself,
-//      we don't need to know what the individual components are.
-//      The drawback, of course is that you don't get the benefits of
-//      syntax-checking on the CSS. This gives us a 50% speed-up in the parser,
-//      and a smaller speed-up in the code-gen.
-//
-//
-//    Token matching is done with the `$` function, which either takes
-//    a terminal string or regexp, or a non-terminal function to call.
-//    It also takes care of moving all the indices forwards.
-//
-//
-less.Parser = function Parser(env) {
-    var input,       // LeSS input string
-        i,           // current index in `input`
-        j,           // current chunk
-        temp,        // temporarily holds a chunk's state, for backtracking
-        memo,        // temporarily holds `i`, when backtracking
-        furthest,    // furthest index the parser has gone to
-        chunks,      // chunkified input
-        current,     // index of current chunk, in `input`
-        parser;
-
-    var that = this;
-
-    // Top parser on an import tree must be sure there is one "env"
-    // which will then be passed arround by reference.
-    var env = env || { };
-    if (!env.contents) { env.contents={}; }  // env.contents must be passed arround with top env
-
-    // This function is called after all files
-    // have been imported through `@import`.
-    var finish = function () {};
-
-    var imports = this.imports = {
-        paths: env && env.paths || [],  // Search paths, when importing
-        queue: [],                      // Files which haven't been imported yet
-        files: {},                      // Holds the imported parse trees
-        contents: env.contents,         // Holds the imported file contents
-        mime:  env && env.mime,         // MIME type of .less files
-        error: null,                    // Error in parsing/evaluating an import
-        push: function (path, callback) {
-            var that = this;
-            this.queue.push(path);
-
-            //
-            // Import a file asynchronously
-            //
-            less.Parser.importer(path, this.paths, function (e, root) {
-                that.queue.splice(that.queue.indexOf(path), 1); // Remove the path from the queue
-
-                var imported = path in that.files;
-
-                that.files[path] = root;                        // Store the root
-
-                if (e && !that.error) { that.error = e }
-
-                callback(e, root, imported);
-
-                if (that.queue.length === 0) { finish(e) }       // Call `finish` if we're done importing
-            }, env);
-        }
-    };
-
-    function save()    { temp = chunks[j], memo = i, current = i }
-    function restore() { chunks[j] = temp, i = memo, current = i }
-
-    function sync() {
-        if (i > current) {
-            chunks[j] = chunks[j].slice(i - current);
-            current = i;
-        }
-    }
-    function isWhitespace(c) {
-        // Could change to \s?
-        var code = c.charCodeAt(0);
-        return code === 32 || code === 10 || code === 9;
-    }
-    //
-    // Parse from a token, regexp or string, and move forward if match
-    //
-    function $(tok) {
-        var match, args, length, index, k;
-
-        //
-        // Non-terminal
-        //
-        if (tok instanceof Function) {
-            return tok.call(parser.parsers);
-        //
-        // Terminal
-        //
-        //     Either match a single character in the input,
-        //     or match a regexp in the current chunk (chunk[j]).
-        //
-        } else if (typeof(tok) === 'string') {
-            match = input.charAt(i) === tok ? tok : null;
-            length = 1;
-            sync ();
-        } else {
-            sync ();
-
-            if (match = tok.exec(chunks[j])) {
-                length = match[0].length;
-            } else {
-                return null;
-            }
-        }
-
-        // The match is confirmed, add the match length to `i`,
-        // and consume any extra white-space characters (' ' || '\n')
-        // which come after that. The reason for this is that LeSS's
-        // grammar is mostly white-space insensitive.
-        //
-        if (match) {
-            skipWhitespace(length);
-
-            if(typeof(match) === 'string') {
-                return match;
-            } else {
-                return match.length === 1 ? match[0] : match;
-            }
-        }
-    }
-
-    function skipWhitespace(length) {
-        var oldi = i, oldj = j,
-            endIndex = i + chunks[j].length,
-            mem = i += length;
-
-        while (i < endIndex) {
-            if (! isWhitespace(input.charAt(i))) { break }
-            i++;
-        }
-        chunks[j] = chunks[j].slice(length + (i - mem));
-        current = i;
-
-        if (chunks[j].length === 0 && j < chunks.length - 1) { j++ }
-
-        return oldi !== i || oldj !== j;
-    }
-
-    function expect(arg, msg) {
-        var result = $(arg);
-        if (! result) {
-            error(msg || (typeof(arg) === 'string' ? "expected '" + arg + "' got '" + input.charAt(i) + "'"
-                                                   : "unexpected token"));
-        } else {
-            return result;
-        }
-    }
-
-    function error(msg, type) {
-        throw { index: i, type: type || 'Syntax', message: msg };
-    }
-
-    // Same as $(), but don't change the state of the parser,
-    // just return the match.
-    function peek(tok) {
-        if (typeof(tok) === 'string') {
-            return input.charAt(i) === tok;
-        } else {
-            if (tok.test(chunks[j])) {
-                return true;
-            } else {
-                return false;
-            }
-        }
-    }
-
-    function getInput(e, env) {
-        if (e.filename && env.filename && (e.filename !== env.filename)) {
-            return parser.imports.contents[e.filename];
-        } else {
-            return input;
-        }
-    }
-
-    function getLocation(index, input) {
-        for (var n = index, column = -1;
-                 n >= 0 && input.charAt(n) !== '\n';
-                 n--) { column++ }
-
-        return { line:   typeof(index) === 'number' ? (input.slice(0, index).match(/\n/g) || "").length : null,
-                 column: column };
-    }
-
-    function getFileName(e) {
-        if(less.mode === 'browser' || less.mode === 'rhino')
-            return e.filename;
-        else
-            return require('path').resolve(e.filename);
-    }
-
-    function getDebugInfo(index, inputStream, e) {
-        return {
-            lineNumber: getLocation(index, inputStream).line + 1,
-            fileName: getFileName(e)
-        };
-    }
-
-    function LessError(e, env) {
-        var input = getInput(e, env),
-            loc = getLocation(e.index, input),
-            line = loc.line,
-            col  = loc.column,
-            lines = input.split('\n');
-
-        this.type = e.type || 'Syntax';
-        this.message = e.message;
-        this.filename = e.filename || env.filename;
-        this.index = e.index;
-        this.line = typeof(line) === 'number' ? line + 1 : null;
-        this.callLine = e.call && (getLocation(e.call, input).line + 1);
-        this.callExtract = lines[getLocation(e.call, input).line];
-        this.stack = e.stack;
-        this.column = col;
-        this.extract = [
-            lines[line - 1],
-            lines[line],
-            lines[line + 1]
-        ];
-    }
-
-    this.env = env = env || {};
-
-    // The optimization level dictates the thoroughness of the parser,
-    // the lower the number, the less nodes it will create in the tree.
-    // This could matter for debugging, or if you want to access
-    // the individual nodes in the tree.
-    this.optimization = ('optimization' in this.env) ? this.env.optimization : 1;
-
-    this.env.filename = this.env.filename || null;
-
-    //
-    // The Parser
-    //
-    return parser = {
-
-        imports: imports,
-        //
-        // Parse an input string into an abstract syntax tree,
-        // call `callback` when done.
-        //
-        parse: function (str, callback) {
-            var root, start, end, zone, line, lines, buff = [], c, error = null;
-
-            i = j = current = furthest = 0;
-            input = str.replace(/\r\n/g, '\n');
-
-            // Remove potential UTF Byte Order Mark
-            input = input.replace(/^\uFEFF/, '');
-
-            // Split the input into chunks.
-            chunks = (function (chunks) {
-                var j = 0,
-                    skip = /(?:@\{[\w-]+\}|[^"'`\{\}\/\(\)\\])+/g,
-                    comment = /\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/.*/g,
-                    string = /"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'|`((?:[^`]|\\.)*)`/g,
-                    level = 0,
-                    match,
-                    chunk = chunks[0],
-                    inParam;
-
-                for (var i = 0, c, cc; i < input.length; i++) {
-                    skip.lastIndex = i;
-                    if (match = skip.exec(input)) {
-                        if (match.index === i) {
-                            i += match[0].length;
-                            chunk.push(match[0]);
-                        }
-                    }
-                    c = input.charAt(i);
-                    comment.lastIndex = string.lastIndex = i;
-
-                    if (match = string.exec(input)) {
-                        if (match.index === i) {
-                            i += match[0].length;
-                            chunk.push(match[0]);
-                            c = input.charAt(i);
-                        }
-                    }
-
-                    if (!inParam && c === '/') {
-                        cc = input.charAt(i + 1);
-                        if (cc === '/' || cc === '*') {
-                            if (match = comment.exec(input)) {
-                                if (match.index === i) {
-                                    i += match[0].length;
-                                    chunk.push(match[0]);
-                                    c = input.charAt(i);
-                                }
-                            }
-                        }
-                    }
-                    
-                    switch (c) {
-                        case '{': if (! inParam) { level ++;        chunk.push(c);                           break }
-                        case '}': if (! inParam) { level --;        chunk.push(c); chunks[++j] = chunk = []; break }
-                        case '(': if (! inParam) { inParam = true;  chunk.push(c);                           break }
-                        case ')': if (  inParam) { inParam = false; chunk.push(c);                           break }
-                        default:                                    chunk.push(c);
-                    }
-                }
-                if (level > 0) {
-                    error = new(LessError)({
-                        index: i,
-                        type: 'Parse',
-                        message: "missing closing `}`",
-                        filename: env.filename
-                    }, env);
-                }
-
-                return chunks.map(function (c) { return c.join('') });;
-            })([[]]);
-
-            if (error) {
-                return callback(error);
-            }
-
-            // Start with the primary rule.
-            // The whole syntax tree is held under a Ruleset node,
-            // with the `root` property set to true, so no `{}` are
-            // output. The callback is called when the input is parsed.
-            try {
-                root = new(tree.Ruleset)([], $(this.parsers.primary));
-                root.root = true;
-            } catch (e) {
-                return callback(new(LessError)(e, env));
-            }
-
-            root.toCSS = (function (evaluate) {
-                var line, lines, column;
-
-                return function (options, variables) {
-                    var frames = [], importError;
-
-                    options = options || {};
-                    //
-                    // Allows setting variables with a hash, so:
-                    //
-                    //   `{ color: new(tree.Color)('#f01') }` will become:
-                    //
-                    //   new(tree.Rule)('@color',
-                    //     new(tree.Value)([
-                    //       new(tree.Expression)([
-                    //         new(tree.Color)('#f01')
-                    //       ])
-                    //     ])
-                    //   )
-                    //
-                    if (typeof(variables) === 'object' && !Array.isArray(variables)) {
-                        variables = Object.keys(variables).map(function (k) {
-                            var value = variables[k];
-
-                            if (! (value instanceof tree.Value)) {
-                                if (! (value instanceof tree.Expression)) {
-                                    value = new(tree.Expression)([value]);
-                                }
-                                value = new(tree.Value)([value]);
-                            }
-                            return new(tree.Rule)('@' + k, value, false, 0);
-                        });
-                        frames = [new(tree.Ruleset)(null, variables)];
-                    }
-
-                    try {
-                        var css = evaluate.call(this, { frames: frames })
-                                          .toCSS([], { compress: options.compress || false, dumpLineNumbers: env.dumpLineNumbers });
-                    } catch (e) {
-                        throw new(LessError)(e, env);
-                    }
-
-                    if ((importError = parser.imports.error)) { // Check if there was an error during importing
-                        if (importError instanceof LessError) throw importError;
-                        else                                  throw new(LessError)(importError, env);
-                    }
-
-                    if (options.yuicompress && less.mode === 'node') {
-                        return require('./cssmin').compressor.cssmin(css);
-                    } else if (options.compress) {
-                        return css.replace(/(\s)+/g, "$1");
-                    } else {
-                        return css;
-                    }
-                };
-            })(root.eval);
-
-            // If `i` is smaller than the `input.length - 1`,
-            // it means the parser wasn't able to parse the whole
-            // string, so we've got a parsing error.
-            //
-            // We try to extract a \n delimited string,
-            // showing the line where the parse error occured.
-            // We split it up into two parts (the part which parsed,
-            // and the part which didn't), so we can color them differently.
-            if (i < input.length - 1) {
-                i = furthest;
-                lines = input.split('\n');
-                line = (input.slice(0, i).match(/\n/g) || "").length + 1;
-
-                for (var n = i, column = -1; n >= 0 && input.charAt(n) !== '\n'; n--) { column++ }
-
-                error = {
-                    type: "Parse",
-                    message: "Syntax Error on line " + line,
-                    index: i,
-                    filename: env.filename,
-                    line: line,
-                    column: column,
-                    extract: [
-                        lines[line - 2],
-                        lines[line - 1],
-                        lines[line]
-                    ]
-                };
-            }
-
-            if (this.imports.queue.length > 0) {
-                finish = function (e) {
-                    if (e) callback(e);
-                    else callback(null, root);
-                };
-            } else {
-                callback(error, root);
-            }
-        },
-
-        //
-        // Here in, the parsing rules/functions
-        //
-        // The basic structure of the syntax tree generated is as follows:
-        //
-        //   Ruleset ->  Rule -> Value -> Expression -> Entity
-        //
-        // Here's some LESS code:
-        //
-        //    .class {
-        //      color: #fff;
-        //      border: 1px solid #000;
-        //      width: @w + 4px;
-        //      > .child {...}
-        //    }
-        //
-        // And here's what the parse tree might look like:
-        //
-        //     Ruleset (Selector '.class', [
-        //         Rule ("color",  Value ([Expression [Color #fff]]))
-        //         Rule ("border", Value ([Expression [Dimension 1px][Keyword "solid"][Color #000]]))
-        //         Rule ("width",  Value ([Expression [Operation "+" [Variable "@w"][Dimension 4px]]]))
-        //         Ruleset (Selector [Element '>', '.child'], [...])
-        //     ])
-        //
-        //  In general, most rules will try to parse a token with the `$()` function, and if the return
-        //  value is truly, will return a new node, of the relevant type. Sometimes, we need to check
-        //  first, before parsing, that's when we use `peek()`.
-        //
-        parsers: {
-            //
-            // The `primary` rule is the *entry* and *exit* point of the parser.
-            // The rules here can appear at any level of the parse tree.
-            //
-            // The recursive nature of the grammar is an interplay between the `block`
-            // rule, which represents `{ ... }`, the `ruleset` rule, and this `primary` rule,
-            // as represented by this simplified grammar:
-            //
-            //     primary  →  (ruleset | rule)+
-            //     ruleset  →  selector+ block
-            //     block    →  '{' primary '}'
-            //
-            // Only at one point is the primary rule not called from the
-            // block rule: at the root level.
-            //
-            primary: function () {
-                var node, root = [];
-
-                while ((node = $(this.mixin.definition) || $(this.rule)    ||  $(this.ruleset) ||
-                               $(this.mixin.call)       || $(this.comment) ||  $(this.directive))
-                               || $(/^[\s\n]+/)) {
-                    node && root.push(node);
-                }
-                return root;
-            },
-
-            // We create a Comment node for CSS comments `/* */`,
-            // but keep the LeSS comments `//` silent, by just skipping
-            // over them.
-            comment: function () {
-                var comment;
-
-                if (input.charAt(i) !== '/') return;
-
-                if (input.charAt(i + 1) === '/') {
-                    return new(tree.Comment)($(/^\/\/.*/), true);
-                } else if (comment = $(/^\/\*(?:[^*]|\*+[^\/*])*\*+\/\n?/)) {
-                    return new(tree.Comment)(comment);
-                }
-            },
-
-            //
-            // Entities are tokens which can be found inside an Expression
-            //
-            entities: {
-                //
-                // A string, which supports escaping " and '
-                //
-                //     "milky way" 'he\'s the one!'
-                //
-                quoted: function () {
-                    var str, j = i, e;
-
-                    if (input.charAt(j) === '~') { j++, e = true } // Escaped strings
-                    if (input.charAt(j) !== '"' && input.charAt(j) !== "'") return;
-
-                    e && $('~');
-
-                    if (str = $(/^"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'/)) {
-                        return new(tree.Quoted)(str[0], str[1] || str[2], e);
-                    }
-                },
-
-                //
-                // A catch-all word, such as:
-                //
-                //     black border-collapse
-                //
-                keyword: function () {
-                    var k;
-
-                    if (k = $(/^[_A-Za-z-][_A-Za-z0-9-]*/)) {
-                        if (tree.colors.hasOwnProperty(k)) {
-                            // detect named color
-                            return new(tree.Color)(tree.colors[k].slice(1));
-                        } else {
-                            return new(tree.Keyword)(k);
-                        }
-                    }
-                },
-
-                //
-                // A function call
-                //
-                //     rgb(255, 0, 255)
-                //
-                // We also try to catch IE's `alpha()`, but let the `alpha` parser
-                // deal with the details.
-                //
-                // The arguments are parsed with the `entities.arguments` parser.
-                //
-                call: function () {
-                    var name, nameLC, args, alpha_ret, index = i;
-
-                    if (! (name = /^([\w-]+|%|progid:[\w\.]+)\(/.exec(chunks[j]))) return;
-
-                    name = name[1];
-                    nameLC = name.toLowerCase();
-
-                    if (nameLC === 'url') { return null }
-                    else                { i += name.length }
-
-                    if (nameLC === 'alpha') {
-                        alpha_ret = $(this.alpha);
-                        if(typeof alpha_ret !== 'undefined') {
-                            return alpha_ret;
-                        }
-                    }
-
-                    $('('); // Parse the '(' and consume whitespace.
-
-                    args = $(this.entities.arguments);
-
-                    if (! $(')')) return;
-
-                    if (name) { return new(tree.Call)(name, args, index, env.filename) }
-                },
-                arguments: function () {
-                    var args = [], arg;
-
-                    while (arg = $(this.entities.assignment) || $(this.expression)) {
-                        args.push(arg);
-                        if (! $(',')) { break }
-                    }
-                    return args;
-                },
-                literal: function () {
-                    return $(this.entities.ratio) ||
-                           $(this.entities.dimension) ||
-                           $(this.entities.color) ||
-                           $(this.entities.quoted);
-                },
-
-                // Assignments are argument entities for calls.
-                // They are present in ie filter properties as shown below.
-                //
-                //     filter: progid:DXImageTransform.Microsoft.Alpha( *opacity=50* )
-                //
-
-                assignment: function () {
-                    var key, value;
-                    if ((key = $(/^\w+(?=\s?=)/i)) && $('=') && (value = $(this.entity))) {
-                        return new(tree.Assignment)(key, value);
-                    }
-                },
-
-                //
-                // Parse url() tokens
-                //
-                // We use a specific rule for urls, because they don't really behave like
-                // standard function calls. The difference is that the argument doesn't have
-                // to be enclosed within a string, so it can't be parsed as an Expression.
-                //
-                url: function () {
-                    var value;
-
-                    if (input.charAt(i) !== 'u' || !$(/^url\(/)) return;
-                    value = $(this.entities.quoted)  || $(this.entities.variable) ||
-                            $(/^(?:(?:\\[\(\)'"])|[^\(\)'"])+/) || "";
-
-                    expect(')');
-
-                    return new(tree.URL)((value.value != null || value instanceof tree.Variable)
-                                        ? value : new(tree.Anonymous)(value), imports.paths);
-                },
-
-                //
-                // A Variable entity, such as `@fink`, in
-                //
-                //     width: @fink + 2px
-                //
-                // We use a different parser for variable definitions,
-                // see `parsers.variable`.
-                //
-                variable: function () {
-                    var name, index = i;
-
-                    if (input.charAt(i) === '@' && (name = $(/^@@?[\w-]+/))) {
-                        return new(tree.Variable)(name, index, env.filename);
-                    }
-                },
-
-                // A variable entity useing the protective {} e.g. @{var}
-                variableCurly: function () {
-                    var name, curly, index = i;
-
-                    if (input.charAt(i) === '@' && (curly = $(/^@\{([\w-]+)\}/))) {
-                        return new(tree.Variable)("@" + curly[1], index, env.filename);
-                    }
-                },
-
-                //
-                // A Hexadecimal color
-                //
-                //     #4F3C2F
-                //
-                // `rgb` and `hsl` colors are parsed through the `entities.call` parser.
-                //
-                color: function () {
-                    var rgb;
-
-                    if (input.charAt(i) === '#' && (rgb = $(/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/))) {
-                        return new(tree.Color)(rgb[1]);
-                    }
-                },
-
-                //
-                // A Dimension, that is, a number and a unit
-                //
-                //     0.5em 95%
-                //
-                dimension: function () {
-                    var value, c = input.charCodeAt(i);
-                    if ((c > 57 || c < 45) || c === 47) return;
-
-                    if (value = $(/^(-?\d*\.?\d+)(px|%|em|pc|ex|in|deg|s|ms|pt|cm|mm|rad|grad|turn|dpi|dpcm|dppx|rem|vw|vh|vmin|vm|ch)?/)) {
-                        return new(tree.Dimension)(value[1], value[2]);
-                    }
-                },
-
-                //
-                // A Ratio
-                //
-                //    16/9
-                //
-                ratio: function () {
-                  var value, c = input.charCodeAt(i);
-                  if (c > 57 || c < 48) return;
-
-                  if (value = $(/^(\d+\/\d+)/)) {
-                    return new(tree.Ratio)(value[1]);
-                  }
-                },
-
-                //
-                // JavaScript code to be evaluated
-                //
-                //     `window.location.href`
-                //
-                javascript: function () {
-                    var str, j = i, e;
-
-                    if (input.charAt(j) === '~') { j++, e = true } // Escaped strings
-                    if (input.charAt(j) !== '`') { return }
-
-                    e && $('~');
-
-                    if (str = $(/^`([^`]*)`/)) {
-                        return new(tree.JavaScript)(str[1], i, e);
-                    }
-                }
-            },
-
-            //
-            // The variable part of a variable definition. Used in the `rule` parser
-            //
-            //     @fink:
-            //
-            variable: function () {
-                var name;
-
-                if (input.charAt(i) === '@' && (name = $(/^(@[\w-]+)\s*:/))) { return name[1] }
-            },
-
-            //
-            // A font size/line-height shorthand
-            //
-            //     small/12px
-            //
-            // We need to peek first, or we'll match on keywords and dimensions
-            //
-            shorthand: function () {
-                var a, b;
-
-                if (! peek(/^[@\w.%-]+\/[@\w.-]+/)) return;
-
-                save();
-
-                if ((a = $(this.entity)) && $('/') && (b = $(this.entity))) {
-                    return new(tree.Shorthand)(a, b);
-                }
-
-                restore();
-            },
-
-            //
-            // Mixins
-            //
-            mixin: {
-                //
-                // A Mixin call, with an optional argument list
-                //
-                //     #mixins > .square(#fff);
-                //     .rounded(4px, black);
-                //     .button;
-                //
-                // The `while` loop is there because mixins can be
-                // namespaced, but we only support the child and descendant
-                // selector for now.
-                //
-                call: function () {
-                    var elements = [], e, c, args = [], arg, index = i, s = input.charAt(i), name, value, important = false;
-
-                    if (s !== '.' && s !== '#') { return }
-                    
-                    save(); // stop us absorbing part of an invalid selector
-
-                    while (e = $(/^[#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/)) {
-                        elements.push(new(tree.Element)(c, e, i));
-                        c = $('>');
-                    }
-                    if ($('(')) {
-                        while (arg = $(this.expression)) {
-                            value = arg;
-                            name = null;
-
-                            // Variable
-                            if (arg.value.length == 1) {
-                                var val = arg.value[0];
-                                if (val instanceof tree.Variable) {
-                                    if ($(':')) {
-                                        if (value = $(this.expression)) {
-                                            name = val.name;
-                                        } else {
-                                            throw new(Error)("Expected value");
-                                        }
-                                    }
-                                }
-                            }
-
-                            args.push({ name: name, value: value });
-
-                            if (! $(',')) { break }
-                        }
-                        if (! $(')')) throw new(Error)("Expected )");
-                    }
-
-                    if ($(this.important)) {
-                        important = true;
-                    }
-
-                    if (elements.length > 0 && ($(';') || peek('}'))) {
-                        return new(tree.mixin.Call)(elements, args, index, env.filename, important);
-                    }
-                    
-                    restore();
-                },
-
-                //
-                // A Mixin definition, with a list of parameters
-                //
-                //     .rounded (@radius: 2px, @color) {
-                //        ...
-                //     }
-                //
-                // Until we have a finer grained state-machine, we have to
-                // do a look-ahead, to make sure we don't have a mixin call.
-                // See the `rule` function for more information.
-                //
-                // We start by matching `.rounded (`, and then proceed on to
-                // the argument list, which has optional default values.
-                // We store the parameters in `params`, with a `value` key,
-                // if there is a value, such as in the case of `@radius`.
-                //
-                // Once we've got our params list, and a closing `)`, we parse
-                // the `{...}` block.
-                //
-                definition: function () {
-                    var name, params = [], match, ruleset, param, value, cond, variadic = false;
-                    if ((input.charAt(i) !== '.' && input.charAt(i) !== '#') ||
-                        peek(/^[^{]*(;|})/)) return;
-
-                    save();
-
-                    if (match = $(/^([#.](?:[\w-]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+)\s*\(/)) {
-                        name = match[1];
-
-                        do {
-                            if (input.charAt(i) === '.' && $(/^\.{3}/)) {
-                                variadic = true;
-                                break;
-                            } else if (param = $(this.entities.variable) || $(this.entities.literal)
-                                                                         || $(this.entities.keyword)) {
-                                // Variable
-                                if (param instanceof tree.Variable) {
-                                    if ($(':')) {
-                                        value = expect(this.expression, 'expected expression');
-                                        params.push({ name: param.name, value: value });
-                                    } else if ($(/^\.{3}/)) {
-                                        params.push({ name: param.name, variadic: true });
-                                        variadic = true;
-                                        break;
-                                    } else {
-                                        params.push({ name: param.name });
-                                    }
-                                } else {
-                                    params.push({ value: param });
-                                }
-                            } else {
-                                break;
-                            }
-                        } while ($(','))
-
-                        // .mixincall("@{a}"); 
-                        // looks a bit like a mixin definition.. so we have to be nice and restore
-                        if (!$(')')) {
-                            furthest = i;
-                            restore();
-                        }
-
-                        if ($(/^when/)) { // Guard
-                            cond = expect(this.conditions, 'expected condition');
-                        }
-
-                        ruleset = $(this.block);
-
-                        if (ruleset) {
-                            return new(tree.mixin.Definition)(name, params, ruleset, cond, variadic);
-                        } else {
-                            restore();
-                        }
-                    }
-                }
-            },
-
-            //
-            // Entities are the smallest recognized token,
-            // and can be found inside a rule's value.
-            //
-            entity: function () {
-                return $(this.entities.literal) || $(this.entities.variable) || $(this.entities.url) ||
-                       $(this.entities.call)    || $(this.entities.keyword)  || $(this.entities.javascript) ||
-                       $(this.comment);
-            },
-
-            //
-            // A Rule terminator. Note that we use `peek()` to check for '}',
-            // because the `block` rule will be expecting it, but we still need to make sure
-            // it's there, if ';' was ommitted.
-            //
-            end: function () {
-                return $(';') || peek('}');
-            },
-
-            //
-            // IE's alpha function
-            //
-            //     alpha(opacity=88)
-            //
-            alpha: function () {
-                var value;
-
-                if (! $(/^\(opacity=/i)) return;
-                if (value = $(/^\d+/) || $(this.entities.variable)) {
-                    expect(')');
-                    return new(tree.Alpha)(value);
-                }
-            },
-
-            //
-            // A Selector Element
-            //
-            //     div
-            //     + h1
-            //     #socks
-            //     input[type="text"]
-            //
-            // Elements are the building blocks for Selectors,
-            // they are made out of a `Combinator` (see combinator rule),
-            // and an element name, such as a tag a class, or `*`.
-            //
-            element: function () {
-                var e, t, c, v;
-
-                c = $(this.combinator);
-
-                e = $(/^(?:\d+\.\d+|\d+)%/) || $(/^(?:[.#]?|:*)(?:[\w-]|[^\x00-\x9f]|\\(?:[A-Fa-f0-9]{1,6} ?|[^A-Fa-f0-9]))+/) ||
-                    $('*') || $('&') || $(this.attribute) || $(/^\([^)@]+\)/) || $(/^[\.#](?=@)/) || $(this.entities.variableCurly);
-
-                if (! e) {
-                    if ($('(') && (v = ($(this.entities.variableCurly) || $(this.entities.variable))) && $(')')) {
-                        e = new(tree.Paren)(v);
-                    }
-                }
-
-                if (e) { return new(tree.Element)(c, e, i) }
-            },
-
-            //
-            // Combinators combine elements together, in a Selector.
-            //
-            // Because our parser isn't white-space sensitive, special care
-            // has to be taken, when parsing the descendant combinator, ` `,
-            // as it's an empty space. We have to check the previous character
-            // in the input, to see if it's a ` ` character. More info on how
-            // we deal with this in *combinator.js*.
-            //
-            combinator: function () {
-                var match, c = input.charAt(i);
-
-                if (c === '>' || c === '+' || c === '~') {
-                    i++;
-                    while (input.charAt(i).match(/\s/)) { i++ }
-                    return new(tree.Combinator)(c);
-                } else if (input.charAt(i - 1).match(/\s/)) {
-                    return new(tree.Combinator)(" ");
-                } else {
-                    return new(tree.Combinator)(null);
-                }
-            },
-
-            //
-            // A CSS Selector
-            //
-            //     .class > div + h1
-            //     li a:hover
-            //
-            // Selectors are made out of one or more Elements, see above.
-            //
-            selector: function () {
-                var sel, e, elements = [], c, match;
-
-                // depreciated, will be removed soon
-                if ($('(')) {
-                    sel = $(this.entity);
-                    expect(')');
-                    return new(tree.Selector)([new(tree.Element)('', sel, i)]);
-                }
-
-                while (e = $(this.element)) {
-                    c = input.charAt(i);
-                    elements.push(e)
-                    if (c === '{' || c === '}' || c === ';' || c === ',') { break }
-                }
-
-                if (elements.length > 0) { return new(tree.Selector)(elements) }
-            },
-            tag: function () {
-                return $(/^[A-Za-z][A-Za-z-]*[0-9]?/) || $('*');
-            },
-            attribute: function () {
-                var attr = '', key, val, op;
-
-                if (! $('[')) return;
-
-                if (key = $(/^(?:[_A-Za-z0-9-]|\\.)+/) || $(this.entities.quoted)) {
-                    if ((op = $(/^[|~*$^]?=/)) &&
-                        (val = $(this.entities.quoted) || $(/^[\w-]+/))) {
-                        attr = [key, op, val.toCSS ? val.toCSS() : val].join('');
-                    } else { attr = key }
-                }
-
-                if (! $(']')) return;
-
-                if (attr) { return "[" + attr + "]" }
-            },
-
-            //
-            // The `block` rule is used by `ruleset` and `mixin.definition`.
-            // It's a wrapper around the `primary` rule, with added `{}`.
-            //
-            block: function () {
-                var content;
-                if ($('{') && (content = $(this.primary)) && $('}')) {
-                    return content;
-                }
-            },
-
-            //
-            // div, .class, body > p {...}
-            //
-            ruleset: function () {
-                var selectors = [], s, rules, match, debugInfo;
-                save();
-
-                if (env.dumpLineNumbers)
-                    debugInfo = getDebugInfo(i, input, env);
-
-                while (s = $(this.selector)) {
-                    selectors.push(s);
-                    $(this.comment);
-                    if (! $(',')) { break }
-                    $(this.comment);
-                }
-
-                if (selectors.length > 0 && (rules = $(this.block))) {
-                    var ruleset = new(tree.Ruleset)(selectors, rules, env.strictImports);
-                    if (env.dumpLineNumbers)
-                        ruleset.debugInfo = debugInfo;
-                    return ruleset;
-                } else {
-                    // Backtrack
-                    furthest = i;
-                    restore();
-                }
-            },
-            rule: function () {
-                var name, value, c = input.charAt(i), important, match;
-                save();
-
-                if (c === '.' || c === '#' || c === '&') { return }
-
-                if (name = $(this.variable) || $(this.property)) {
-                    if ((name.charAt(0) != '@') && (match = /^([^@+\/'"*`(;{}-]*);/.exec(chunks[j]))) {
-                        i += match[0].length - 1;
-                        value = new(tree.Anonymous)(match[1]);
-                    } else if (name === "font") {
-                        value = $(this.font);
-                    } else {
-                        value = $(this.value);
-                    }
-                    important = $(this.important);
-
-                    if (value && $(this.end)) {
-                        return new(tree.Rule)(name, value, important, memo);
-                    } else {
-                        furthest = i;
-                        restore();
-                    }
-                }
-            },
-
-            //
-            // An @import directive
-            //
-            //     @import "lib";
-            //
-            // Depending on our environemnt, importing is done differently:
-            // In the browser, it's an XHR request, in Node, it would be a
-            // file-system operation. The function used for importing is
-            // stored in `import`, which we pass to the Import constructor.
-            //
-            "import": function () {
-                var path, features, index = i;
-                
-                save();
-                
-                var dir = $(/^@import(?:-(once))?\s+/);
-
-                if (dir && (path = $(this.entities.quoted) || $(this.entities.url))) {
-                    features = $(this.mediaFeatures);
-                    if ($(';')) {
-                        return new(tree.Import)(path, imports, features, (dir[1] === 'once'), index);
-                    }
-                }
-                
-                restore();
-            },
-
-            mediaFeature: function () {
-                var e, p, nodes = [];
-
-                do {
-                    if (e = $(this.entities.keyword)) {
-                        nodes.push(e);
-                    } else if ($('(')) {
-                        p = $(this.property);
-                        e = $(this.entity);
-                        if ($(')')) {
-                            if (p && e) {
-                                nodes.push(new(tree.Paren)(new(tree.Rule)(p, e, null, i, true)));
-                            } else if (e) {
-                                nodes.push(new(tree.Paren)(e));
-                            } else {
-                                return null;
-                            }
-                        } else { return null }
-                    }
-                } while (e);
-
-                if (nodes.length > 0) {
-                    return new(tree.Expression)(nodes);
-                }
-            },
-
-            mediaFeatures: function () {
-                var e, features = [];
-
-                do {
-                  if (e = $(this.mediaFeature)) {
-                      features.push(e);
-                      if (! $(',')) { break }
-                  } else if (e = $(this.entities.variable)) {
-                      features.push(e);
-                      if (! $(',')) { break }
-                  }
-                } while (e);
-
-                return features.length > 0 ? features : null;
-            },
-
-            media: function () {
-                var features, rules, media, debugInfo;
-
-                if (env.dumpLineNumbers)
-                    debugInfo = getDebugInfo(i, input, env);
-
-                if ($(/^@media/)) {
-                    features = $(this.mediaFeatures);
-
-                    if (rules = $(this.block)) {
-                        media = new(tree.Media)(rules, features);
-                        if(env.dumpLineNumbers)
-                            media.debugInfo = debugInfo;
-                        return media;
-                    }
-                }
-            },
-
-            //
-            // A CSS Directive
-            //
-            //     @charset "utf-8";
-            //
-            directive: function () {
-                var name, value, rules, identifier, e, nodes, nonVendorSpecificName,
-                    hasBlock, hasIdentifier;
-
-                if (input.charAt(i) !== '@') return;
-
-                if (value = $(this['import']) || $(this.media)) {
-                    return value;
-                }
-                
-                save();
-
-                name = $(/^@[a-z-]+/);
-
-                nonVendorSpecificName = name;
-                if (name.charAt(1) == '-' && name.indexOf('-', 2) > 0) {
-                    nonVendorSpecificName = "@" + name.slice(name.indexOf('-', 2) + 1);
-                }
-
-                switch(nonVendorSpecificName) {
-                    case "@font-face":
-                        hasBlock = true;
-                        break;
-                    case "@viewport":
-                    case "@top-left":
-                    case "@top-left-corner":
-                    case "@top-center":
-                    case "@top-right":
-                    case "@top-right-corner":
-                    case "@bottom-left":
-                    case "@bottom-left-corner":
-                    case "@bottom-center":
-                    case "@bottom-right":
-                    case "@bottom-right-corner":
-                    case "@left-top":
-                    case "@left-middle":
-                    case "@left-bottom":
-                    case "@right-top":
-                    case "@right-middle":
-                    case "@right-bottom":
-                        hasBlock = true;
-                        break;
-                    case "@page":
-                    case "@document":
-                    case "@supports":
-                    case "@keyframes":
-                        hasBlock = true;
-                        hasIdentifier = true;
-                        break;
-                }
-
-                if (hasIdentifier) {
-                    name += " " + ($(/^[^{]+/) || '').trim();
-                }
-
-                if (hasBlock)
-                {
-                    if (rules = $(this.block)) {
-                        return new(tree.Directive)(name, rules);
-                    }
-                } else {
-                    if ((value = $(this.entity)) && $(';')) {
-                        return new(tree.Directive)(name, value);
-                    }
-                }
-                
-                restore();
-            },
-            font: function () {
-                var value = [], expression = [], weight, shorthand, font, e;
-
-                while (e = $(this.shorthand) || $(this.entity)) {
-                    expression.push(e);
-                }
-                value.push(new(tree.Expression)(expression));
-
-                if ($(',')) {
-                    while (e = $(this.expression)) {
-                        value.push(e);
-                        if (! $(',')) { break }
-                    }
-                }
-                return new(tree.Value)(value);
-            },
-
-            //
-            // A Value is a comma-delimited list of Expressions
-            //
-            //     font-family: Baskerville, Georgia, serif;
-            //
-            // In a Rule, a Value represents everything after the `:`,
-            // and before the `;`.
-            //
-            value: function () {
-                var e, expressions = [], important;
-
-                while (e = $(this.expression)) {
-                    expressions.push(e);
-                    if (! $(',')) { break }
-                }
-
-                if (expressions.length > 0) {
-                    return new(tree.Value)(expressions);
-                }
-            },
-            important: function () {
-                if (input.charAt(i) === '!') {
-                    return $(/^! *important/);
-                }
-            },
-            sub: function () {
-                var e;
-
-                if ($('(') && (e = $(this.expression)) && $(')')) {
-                    return e;
-                }
-            },
-            multiplication: function () {
-                var m, a, op, operation;
-                if (m = $(this.operand)) {
-                    while (!peek(/^\/\*/) && (op = ($('/') || $('*'))) && (a = $(this.operand))) {
-                        operation = new(tree.Operation)(op, [operation || m, a]);
-                    }
-                    return operation || m;
-                }
-            },
-            addition: function () {
-                var m, a, op, operation;
-                if (m = $(this.multiplication)) {
-                    while ((op = $(/^[-+]\s+/) || (!isWhitespace(input.charAt(i - 1)) && ($('+') || $('-')))) &&
-                           (a = $(this.multiplication))) {
-                        operation = new(tree.Operation)(op, [operation || m, a]);
-                    }
-                    return operation || m;
-                }
-            },
-            conditions: function () {
-                var a, b, index = i, condition;
-
-                if (a = $(this.condition)) {
-                    while ($(',') && (b = $(this.condition))) {
-                        condition = new(tree.Condition)('or', condition || a, b, index);
-                    }
-                    return condition || a;
-                }
-            },
-            condition: function () {
-                var a, b, c, op, index = i, negate = false;
-
-                if ($(/^not/)) { negate = true }
-                expect('(');
-                if (a = $(this.addition) || $(this.entities.keyword) || $(this.entities.quoted)) {
-                    if (op = $(/^(?:>=|=<|[<=>])/)) {
-                        if (b = $(this.addition) || $(this.entities.keyword) || $(this.entities.quoted)) {
-                            c = new(tree.Condition)(op, a, b, index, negate);
-                        } else {
-                            error('expected expression');
-                        }
-                    } else {
-                        c = new(tree.Condition)('=', a, new(tree.Keyword)('true'), index, negate);
-                    }
-                    expect(')');
-                    return $(/^and/) ? new(tree.Condition)('and', c, $(this.condition)) : c;
-                }
-            },
-
-            //
-            // An operand is anything that can be part of an operation,
-            // such as a Color, or a Variable
-            //
-            operand: function () {
-                var negate, p = input.charAt(i + 1);
-
-                if (input.charAt(i) === '-' && (p === '@' || p === '(')) { negate = $('-') }
-                var o = $(this.sub) || $(this.entities.dimension) ||
-                        $(this.entities.color) || $(this.entities.variable) ||
-                        $(this.entities.call);
-                return negate ? new(tree.Operation)('*', [new(tree.Dimension)(-1), o])
-                              : o;
-            },
-
-            //
-            // Expressions either represent mathematical operations,
-            // or white-space delimited Entities.
-            //
-            //     1px solid black
-            //     @var * 2
-            //
-            expression: function () {
-                var e, delim, entities = [], d;
-
-                while (e = $(this.addition) || $(this.entity)) {
-                    entities.push(e);
-                }
-                if (entities.length > 0) {
-                    return new(tree.Expression)(entities);
-                }
-            },
-            property: function () {
-                var name;
-
-                if (name = $(/^(\*?-?[_a-z0-9-]+)\s*:/)) {
-                    return name[1];
-                }
-            }
-        }
-    };
-};
-
-if (less.mode === 'browser' || less.mode === 'rhino') {
-    //
-    // Used by `@import` directives
-    //
-    less.Parser.importer = function (path, paths, callback, env) {
-        if (!/^([a-z-]+:)?\//.test(path) && paths.length > 0) {
-            path = paths[0] + path;
-        }
-        // We pass `true` as 3rd argument, to force the reload of the import.
-        // This is so we can get the syntax tree as opposed to just the CSS output,
-        // as we need this to evaluate the current stylesheet.
-        // __ Now using the hack of passing a ref to top parser's content cache in the 1st arg. __
-        loadStyleSheet({ href: path, title: path, type: env.mime, contents: env.contents }, function (e) {
-            if (e && typeof(env.errback) === "function") {
-                env.errback.call(null, path, paths, callback, env);
-            } else {
-                callback.apply(null, arguments);
-            }
-        }, true);
-    };
-}
-
-(function (tree) {
-
-tree.functions = {
-    rgb: function (r, g, b) {
-        return this.rgba(r, g, b, 1.0);
-    },
-    rgba: function (r, g, b, a) {
-        var rgb = [r, g, b].map(function (c) { return number(c) }),
-            a = number(a);
-        return new(tree.Color)(rgb, a);
-    },
-    hsl: function (h, s, l) {
-        return this.hsla(h, s, l, 1.0);
-    },
-    hsla: function (h, s, l, a) {
-        h = (number(h) % 360) / 360;
-        s = number(s); l = number(l); a = number(a);
-
-        var m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;
-        var m1 = l * 2 - m2;
-
-        return this.rgba(hue(h + 1/3) * 255,
-                         hue(h)       * 255,
-                         hue(h - 1/3) * 255,
-                         a);
-
-        function hue(h) {
-            h = h < 0 ? h + 1 : (h > 1 ? h - 1 : h);
-            if      (h * 6 < 1) return m1 + (m2 - m1) * h * 6;
-            else if (h * 2 < 1) return m2;
-            else if (h * 3 < 2) return m1 + (m2 - m1) * (2/3 - h) * 6;
-            else                return m1;
-        }
-    },
-    hue: function (color) {
-        return new(tree.Dimension)(Math.round(color.toHSL().h));
-    },
-    saturation: function (color) {
-        return new(tree.Dimension)(Math.round(color.toHSL().s * 100), '%');
-    },
-    lightness: function (color) {
-        return new(tree.Dimension)(Math.round(color.toHSL().l * 100), '%');
-    },
-    red: function (color) {
-        return new(tree.Dimension)(color.rgb[0]);
-    },
-    green: function (color) {
-        return new(tree.Dimension)(color.rgb[1]);
-    },
-    blue: function (color) {
-        return new(tree.Dimension)(color.rgb[2]);
-    },
-    alpha: function (color) {
-        return new(tree.Dimension)(color.toHSL().a);
-    },
-    luma: function (color) {
-        return new(tree.Dimension)(Math.round((0.2126 * (color.rgb[0]/255) +
-            0.7152 * (color.rgb[1]/255) +
-            0.0722 * (color.rgb[2]/255))
-            * color.alpha * 100), '%');
-    },
-    saturate: function (color, amount) {
-        var hsl = color.toHSL();
-
-        hsl.s += amount.value / 100;
-        hsl.s = clamp(hsl.s);
-        return hsla(hsl);
-    },
-    desaturate: function (color, amount) {
-        var hsl = color.toHSL();
-
-        hsl.s -= amount.value / 100;
-        hsl.s = clamp(hsl.s);
-        return hsla(hsl);
-    },
-    lighten: function (color, amount) {
-        var hsl = color.toHSL();
-
-        hsl.l += amount.value / 100;
-        hsl.l = clamp(hsl.l);
-        return hsla(hsl);
-    },
-    darken: function (color, amount) {
-        var hsl = color.toHSL();
-
-        hsl.l -= amount.value / 100;
-        hsl.l = clamp(hsl.l);
-        return hsla(hsl);
-    },
-    fadein: function (color, amount) {
-        var hsl = color.toHSL();
-
-        hsl.a += amount.value / 100;
-        hsl.a = clamp(hsl.a);
-        return hsla(hsl);
-    },
-    fadeout: function (color, amount) {
-        var hsl = color.toHSL();
-
-        hsl.a -= amount.value / 100;
-        hsl.a = clamp(hsl.a);
-        return hsla(hsl);
-    },
-    fade: function (color, amount) {
-        var hsl = color.toHSL();
-
-        hsl.a = amount.value / 100;
-        hsl.a = clamp(hsl.a);
-        return hsla(hsl);
-    },
-    spin: function (color, amount) {
-        var hsl = color.toHSL();
-        var hue = (hsl.h + amount.value) % 360;
-
-        hsl.h = hue < 0 ? 360 + hue : hue;
-
-        return hsla(hsl);
-    },
-    //
-    // Copyright (c) 2006-2009 Hampton Catlin, Nathan Weizenbaum, and Chris Eppstein
-    // http://sass-lang.com
-    //
-    mix: function (color1, color2, weight) {
-        if (!weight) {
-            weight = new(tree.Dimension)(50);
-        }
-        var p = weight.value / 100.0;
-        var w = p * 2 - 1;
-        var a = color1.toHSL().a - color2.toHSL().a;
-
-        var w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2.0;
-        var w2 = 1 - w1;
-
-        var rgb = [color1.rgb[0] * w1 + color2.rgb[0] * w2,
-                   color1.rgb[1] * w1 + color2.rgb[1] * w2,
-                   color1.rgb[2] * w1 + color2.rgb[2] * w2];
-
-        var alpha = color1.alpha * p + color2.alpha * (1 - p);
-
-        return new(tree.Color)(rgb, alpha);
-    },
-    greyscale: function (color) {
-        return this.desaturate(color, new(tree.Dimension)(100));
-    },
-    contrast: function (color, dark, light, threshold) {
-        if (typeof light === 'undefined') {
-            light = this.rgba(255, 255, 255, 1.0);
-        }
-        if (typeof dark === 'undefined') {
-            dark = this.rgba(0, 0, 0, 1.0);
-        }
-        if (typeof threshold === 'undefined') {
-            threshold = 0.43;
-        } else {
-            threshold = threshold.value;
-        }
-        if (((0.2126 * (color.rgb[0]/255) + 0.7152 * (color.rgb[1]/255) + 0.0722 * (color.rgb[2]/255)) * color.alpha) < threshold) {
-            return light;
-        } else {
-            return dark;
-        }
-    },
-    e: function (str) {
-        return new(tree.Anonymous)(str instanceof tree.JavaScript ? str.evaluated : str);
-    },
-    escape: function (str) {
-        return new(tree.Anonymous)(encodeURI(str.value).replace(/=/g, "%3D").replace(/:/g, "%3A").replace(/#/g, "%23").replace(/;/g, "%3B").replace(/\(/g, "%28").replace(/\)/g, "%29"));
-    },
-    '%': function (quoted /* arg, arg, ...*/) {
-        var args = Array.prototype.slice.call(arguments, 1),
-            str = quoted.value;
-
-        for (var i = 0; i < args.length; i++) {
-            str = str.replace(/%[sda]/i, function(token) {
-                var value = token.match(/s/i) ? args[i].value : args[i].toCSS();
-                return token.match(/[A-Z]$/) ? encodeURIComponent(value) : value;
-            });
-        }
-        str = str.replace(/%%/g, '%');
-        return new(tree.Quoted)('"' + str + '"', str);
-    },
-    round: function (n, f) {
-        var fraction = typeof(f) === "undefined" ? 0 : f.value;
-        if (n instanceof tree.Dimension) {
-            return new(tree.Dimension)(number(n).toFixed(fraction), n.unit);
-        } else if (typeof(n) === 'number') {
-            return n.toFixed(fraction);
-        } else {
-            throw { type: "Argument", message: "argument must be a number" };
-        }
-    },
-    ceil: function (n) {
-        return this._math('ceil', n);
-    },
-    floor: function (n) {
-        return this._math('floor', n);
-    },
-    _math: function (fn, n) {
-        if (n instanceof tree.Dimension) {
-            return new(tree.Dimension)(Math[fn](number(n)), n.unit);
-        } else if (typeof(n) === 'number') {
-            return Math[fn](n);
-        } else {
-            throw { type: "Argument", message: "argument must be a number" };
-        }
-    },
-    argb: function (color) {
-        return new(tree.Anonymous)(color.toARGB());
-
-    },
-    percentage: function (n) {
-        return new(tree.Dimension)(n.value * 100, '%');
-    },
-    color: function (n) {
-        if (n instanceof tree.Quoted) {
-            return new(tree.Color)(n.value.slice(1));
-        } else {
-            throw { type: "Argument", message: "argument must be a string" };
-        }
-    },
-    iscolor: function (n) {
-        return this._isa(n, tree.Color);
-    },
-    isnumber: function (n) {
-        return this._isa(n, tree.Dimension);
-    },
-    isstring: function (n) {
-        return this._isa(n, tree.Quoted);
-    },
-    iskeyword: function (n) {
-        return this._isa(n, tree.Keyword);
-    },
-    isurl: function (n) {
-        return this._isa(n, tree.URL);
-    },
-    ispixel: function (n) {
-        return (n instanceof tree.Dimension) && n.unit === 'px' ? tree.True : tree.False;
-    },
-    ispercentage: function (n) {
-        return (n instanceof tree.Dimension) && n.unit === '%' ? tree.True : tree.False;
-    },
-    isem: function (n) {
-        return (n instanceof tree.Dimension) && n.unit === 'em' ? tree.True : tree.False;
-    },
-    _isa: function (n, Type) {
-        return (n instanceof Type) ? tree.True : tree.False;
-    },
-    
-    /* Blending modes */
-    
-    multiply: function(color1, color2) {
-        var r = color1.rgb[0] * color2.rgb[0] / 255;
-        var g = color1.rgb[1] * color2.rgb[1] / 255;
-        var b = color1.rgb[2] * color2.rgb[2] / 255;
-        return this.rgb(r, g, b);
-    },
-    screen: function(color1, color2) {
-        var r = 255 - (255 - color1.rgb[0]) * (255 - color2.rgb[0]) / 255;
-        var g = 255 - (255 - color1.rgb[1]) * (255 - color2.rgb[1]) / 255;
-        var b = 255 - (255 - color1.rgb[2]) * (255 - color2.rgb[2]) / 255;
-        return this.rgb(r, g, b);
-    },
-    overlay: function(color1, color2) {
-        var r = color1.rgb[0] < 128 ? 2 * color1.rgb[0] * color2.rgb[0] / 255 : 255 - 2 * (255 - color1.rgb[0]) * (255 - color2.rgb[0]) / 255;
-        var g = color1.rgb[1] < 128 ? 2 * color1.rgb[1] * color2.rgb[1] / 255 : 255 - 2 * (255 - color1.rgb[1]) * (255 - color2.rgb[1]) / 255;
-        var b = color1.rgb[2] < 128 ? 2 * color1.rgb[2] * color2.rgb[2] / 255 : 255 - 2 * (255 - color1.rgb[2]) * (255 - color2.rgb[2]) / 255;
-        return this.rgb(r, g, b);
-    },
-    softlight: function(color1, color2) {
-        var t = color2.rgb[0] * color1.rgb[0] / 255;
-        var r = t + color1.rgb[0] * (255 - (255 - color1.rgb[0]) * (255 - color2.rgb[0]) / 255 - t) / 255;
-        t = color2.rgb[1] * color1.rgb[1] / 255;
-        var g = t + color1.rgb[1] * (255 - (255 - color1.rgb[1]) * (255 - color2.rgb[1]) / 255 - t) / 255;
-        t = color2.rgb[2] * color1.rgb[2] / 255;
-        var b = t + color1.rgb[2] * (255 - (255 - color1.rgb[2]) * (255 - color2.rgb[2]) / 255 - t) / 255;
-        return this.rgb(r, g, b);
-    },
-    hardlight: function(color1, color2) {
-        var r = color2.rgb[0] < 128 ? 2 * color2.rgb[0] * color1.rgb[0] / 255 : 255 - 2 * (255 - color2.rgb[0]) * (255 - color1.rgb[0]) / 255;
-        var g = color2.rgb[1] < 128 ? 2 * color2.rgb[1] * color1.rgb[1] / 255 : 255 - 2 * (255 - color2.rgb[1]) * (255 - color1.rgb[1]) / 255;
-        var b = color2.rgb[2] < 128 ? 2 * color2.rgb[2] * color1.rgb[2] / 255 : 255 - 2 * (255 - color2.rgb[2]) * (255 - color1.rgb[2]) / 255;
-        return this.rgb(r, g, b);
-    },
-    difference: function(color1, color2) {
-        var r = Math.abs(color1.rgb[0] - color2.rgb[0]);
-        var g = Math.abs(color1.rgb[1] - color2.rgb[1]);
-        var b = Math.abs(color1.rgb[2] - color2.rgb[2]);
-        return this.rgb(r, g, b);
-    },
-    exclusion: function(color1, color2) {
-        var r = color1.rgb[0] + color2.rgb[0] * (255 - color1.rgb[0] - color1.rgb[0]) / 255;
-        var g = color1.rgb[1] + color2.rgb[1] * (255 - color1.rgb[1] - color1.rgb[1]) / 255;
-        var b = color1.rgb[2] + color2.rgb[2] * (255 - color1.rgb[2] - color1.rgb[2]) / 255;
-        return this.rgb(r, g, b);
-    },
-    average: function(color1, color2) {
-        var r = (color1.rgb[0] + color2.rgb[0]) / 2;
-        var g = (color1.rgb[1] + color2.rgb[1]) / 2;
-        var b = (color1.rgb[2] + color2.rgb[2]) / 2;
-        return this.rgb(r, g, b);
-    },
-    negation: function(color1, color2) {
-        var r = 255 - Math.abs(255 - color2.rgb[0] - color1.rgb[0]);
-        var g = 255 - Math.abs(255 - color2.rgb[1] - color1.rgb[1]);
-        var b = 255 - Math.abs(255 - color2.rgb[2] - color1.rgb[2]);
-        return this.rgb(r, g, b);
-    },
-    tint: function(color, amount) {
-        return this.mix(this.rgb(255,255,255), color, amount);
-    },
-    shade: function(color, amount) {
-        return this.mix(this.rgb(0, 0, 0), color, amount);
-    }
-};
-
-function hsla(hsla) {
-    return tree.functions.hsla(hsla.h, hsla.s, hsla.l, hsla.a);
-}
-
-function number(n) {
-    if (n instanceof tree.Dimension) {
-        return parseFloat(n.unit == '%' ? n.value / 100 : n.value);
-    } else if (typeof(n) === 'number') {
-        return n;
-    } else {
-        throw {
-            error: "RuntimeError",
-            message: "color functions take numbers as parameters"
-        };
-    }
-}
-
-function clamp(val) {
-    return Math.min(1, Math.max(0, val));
-}
-
-})(require('./tree'));
-(function (tree) {
-    tree.colors = {
-        'aliceblue':'#f0f8ff',
-        'antiquewhite':'#faebd7',
-        'aqua':'#00ffff',
-        'aquamarine':'#7fffd4',
-        'azure':'#f0ffff',
-        'beige':'#f5f5dc',
-        'bisque':'#ffe4c4',
-        'black':'#000000',
-        'blanchedalmond':'#ffebcd',
-        'blue':'#0000ff',
-        'blueviolet':'#8a2be2',
-        'brown':'#a52a2a',
-        'burlywood':'#deb887',
-        'cadetblue':'#5f9ea0',
-        'chartreuse':'#7fff00',
-        'chocolate':'#d2691e',
-        'coral':'#ff7f50',
-        'cornflowerblue':'#6495ed',
-        'cornsilk':'#fff8dc',
-        'crimson':'#dc143c',
-        'cyan':'#00ffff',
-        'darkblue':'#00008b',
-        'darkcyan':'#008b8b',
-        'darkgoldenrod':'#b8860b',
-        'darkgray':'#a9a9a9',
-        'darkgrey':'#a9a9a9',
-        'darkgreen':'#006400',
-        'darkkhaki':'#bdb76b',
-        'darkmagenta':'#8b008b',
-        'darkolivegreen':'#556b2f',
-        'darkorange':'#ff8c00',
-        'darkorchid':'#9932cc',
-        'darkred':'#8b0000',
-        'darksalmon':'#e9967a',
-        'darkseagreen':'#8fbc8f',
-        'darkslateblue':'#483d8b',
-        'darkslategray':'#2f4f4f',
-        'darkslategrey':'#2f4f4f',
-        'darkturquoise':'#00ced1',
-        'darkviolet':'#9400d3',
-        'deeppink':'#ff1493',
-        'deepskyblue':'#00bfff',
-        'dimgray':'#696969',
-        'dimgrey':'#696969',
-        'dodgerblue':'#1e90ff',
-        'firebrick':'#b22222',
-        'floralwhite':'#fffaf0',
-        'forestgreen':'#228b22',
-        'fuchsia':'#ff00ff',
-        'gainsboro':'#dcdcdc',
-        'ghostwhite':'#f8f8ff',
-        'gold':'#ffd700',
-        'goldenrod':'#daa520',
-        'gray':'#808080',
-        'grey':'#808080',
-        'green':'#008000',
-        'greenyellow':'#adff2f',
-        'honeydew':'#f0fff0',
-        'hotpink':'#ff69b4',
-        'indianred':'#cd5c5c',
-        'indigo':'#4b0082',
-        'ivory':'#fffff0',
-        'khaki':'#f0e68c',
-        'lavender':'#e6e6fa',
-        'lavenderblush':'#fff0f5',
-        'lawngreen':'#7cfc00',
-        'lemonchiffon':'#fffacd',
-        'lightblue':'#add8e6',
-        'lightcoral':'#f08080',
-        'lightcyan':'#e0ffff',
-        'lightgoldenrodyellow':'#fafad2',
-        'lightgray':'#d3d3d3',
-        'lightgrey':'#d3d3d3',
-        'lightgreen':'#90ee90',
-        'lightpink':'#ffb6c1',
-        'lightsalmon':'#ffa07a',
-        'lightseagreen':'#20b2aa',
-        'lightskyblue':'#87cefa',
-        'lightslategray':'#778899',
-        'lightslategrey':'#778899',
-        'lightsteelblue':'#b0c4de',
-        'lightyellow':'#ffffe0',
-        'lime':'#00ff00',
-        'limegreen':'#32cd32',
-        'linen':'#faf0e6',
-        'magenta':'#ff00ff',
-        'maroon':'#800000',
-        'mediumaquamarine':'#66cdaa',
-        'mediumblue':'#0000cd',
-        'mediumorchid':'#ba55d3',
-        'mediumpurple':'#9370d8',
-        'mediumseagreen':'#3cb371',
-        'mediumslateblue':'#7b68ee',
-        'mediumspringgreen':'#00fa9a',
-        'mediumturquoise':'#48d1cc',
-        'mediumvioletred':'#c71585',
-        'midnightblue':'#191970',
-        'mintcream':'#f5fffa',
-        'mistyrose':'#ffe4e1',
-        'moccasin':'#ffe4b5',
-        'navajowhite':'#ffdead',
-        'navy':'#000080',
-        'oldlace':'#fdf5e6',
-        'olive':'#808000',
-        'olivedrab':'#6b8e23',
-        'orange':'#ffa500',
-        'orangered':'#ff4500',
-        'orchid':'#da70d6',
-        'palegoldenrod':'#eee8aa',
-        'palegreen':'#98fb98',
-        'paleturquoise':'#afeeee',
-        'palevioletred':'#d87093',
-        'papayawhip':'#ffefd5',
-        'peachpuff':'#ffdab9',
-        'peru':'#cd853f',
-        'pink':'#ffc0cb',
-        'plum':'#dda0dd',
-        'powderblue':'#b0e0e6',
-        'purple':'#800080',
-        'red':'#ff0000',
-        'rosybrown':'#bc8f8f',
-        'royalblue':'#4169e1',
-        'saddlebrown':'#8b4513',
-        'salmon':'#fa8072',
-        'sandybrown':'#f4a460',
-        'seagreen':'#2e8b57',
-        'seashell':'#fff5ee',
-        'sienna':'#a0522d',
-        'silver':'#c0c0c0',
-        'skyblue':'#87ceeb',
-        'slateblue':'#6a5acd',
-        'slategray':'#708090',
-        'slategrey':'#708090',
-        'snow':'#fffafa',
-        'springgreen':'#00ff7f',
-        'steelblue':'#4682b4',
-        'tan':'#d2b48c',
-        'teal':'#008080',
-        'thistle':'#d8bfd8',
-        'tomato':'#ff6347',
-        // 'transparent':'rgba(0,0,0,0)',
-        'turquoise':'#40e0d0',
-        'violet':'#ee82ee',
-        'wheat':'#f5deb3',
-        'white':'#ffffff',
-        'whitesmoke':'#f5f5f5',
-        'yellow':'#ffff00',
-        'yellowgreen':'#9acd32'
-    };
-})(require('./tree'));
-(function (tree) {
-
-tree.Alpha = function (val) {
-    this.value = val;
-};
-tree.Alpha.prototype = {
-    toCSS: function () {
-        return "alpha(opacity=" +
-               (this.value.toCSS ? this.value.toCSS() : this.value) + ")";
-    },
-    eval: function (env) {
-        if (this.value.eval) { this.value = this.value.eval(env) }
-        return this;
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Anonymous = function (string) {
-    this.value = string.value || string;
-};
-tree.Anonymous.prototype = {
-    toCSS: function () {
-        return this.value;
-    },
-    eval: function () { return this },
-    compare: function (x) {
-        if (!x.toCSS) {
-            return -1;
-        }
-        
-        var left = this.toCSS(),
-            right = x.toCSS();
-        
-        if (left === right) {
-            return 0;
-        }
-        
-        return left < right ? -1 : 1;
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Assignment = function (key, val) {
-    this.key = key;
-    this.value = val;
-};
-tree.Assignment.prototype = {
-    toCSS: function () {
-        return this.key + '=' + (this.value.toCSS ? this.value.toCSS() : this.value);
-    },
-    eval: function (env) {
-        if (this.value.eval) {
-            return new(tree.Assignment)(this.key, this.value.eval(env));
-        }
-        return this;
-    }
-};
-
-})(require('../tree'));(function (tree) {
-
-//
-// A function call node.
-//
-tree.Call = function (name, args, index, filename) {
-    this.name = name;
-    this.args = args;
-    this.index = index;
-    this.filename = filename;
-};
-tree.Call.prototype = {
-    //
-    // When evaluating a function call,
-    // we either find the function in `tree.functions` [1],
-    // in which case we call it, passing the  evaluated arguments,
-    // or we simply print it out as it appeared originally [2].
-    //
-    // The *functions.js* file contains the built-in functions.
-    //
-    // The reason why we evaluate the arguments, is in the case where
-    // we try to pass a variable to a function, like: `saturate(@color)`.
-    // The function should receive the value, not the variable.
-    //
-    eval: function (env) {
-        var args = this.args.map(function (a) { return a.eval(env) });
-
-        if (this.name in tree.functions) { // 1.
-            try {
-                return tree.functions[this.name].apply(tree.functions, args);
-            } catch (e) {
-                throw { type: e.type || "Runtime",
-                        message: "error evaluating function `" + this.name + "`" +
-                                 (e.message ? ': ' + e.message : ''),
-                        index: this.index, filename: this.filename };
-            }
-        } else { // 2.
-            return new(tree.Anonymous)(this.name +
-                   "(" + args.map(function (a) { return a.toCSS(env) }).join(', ') + ")");
-        }
-    },
-
-    toCSS: function (env) {
-        return this.eval(env).toCSS();
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-//
-// RGB Colors - #ff0014, #eee
-//
-tree.Color = function (rgb, a) {
-    //
-    // The end goal here, is to parse the arguments
-    // into an integer triplet, such as `128, 255, 0`
-    //
-    // This facilitates operations and conversions.
-    //
-    if (Array.isArray(rgb)) {
-        this.rgb = rgb;
-    } else if (rgb.length == 6) {
-        this.rgb = rgb.match(/.{2}/g).map(function (c) {
-            return parseInt(c, 16);
-        });
-    } else {
-        this.rgb = rgb.split('').map(function (c) {
-            return parseInt(c + c, 16);
-        });
-    }
-    this.alpha = typeof(a) === 'number' ? a : 1;
-};
-tree.Color.prototype = {
-    eval: function () { return this },
-
-    //
-    // If we have some transparency, the only way to represent it
-    // is via `rgba`. Otherwise, we use the hex representation,
-    // which has better compatibility with older browsers.
-    // Values are capped between `0` and `255`, rounded and zero-padded.
-    //
-    toCSS: function () {
-        if (this.alpha < 1.0) {
-            return "rgba(" + this.rgb.map(function (c) {
-                return Math.round(c);
-            }).concat(this.alpha).join(', ') + ")";
-        } else {
-            return '#' + this.rgb.map(function (i) {
-                i = Math.round(i);
-                i = (i > 255 ? 255 : (i < 0 ? 0 : i)).toString(16);
-                return i.length === 1 ? '0' + i : i;
-            }).join('');
-        }
-    },
-
-    //
-    // Operations have to be done per-channel, if not,
-    // channels will spill onto each other. Once we have
-    // our result, in the form of an integer triplet,
-    // we create a new Color node to hold the result.
-    //
-    operate: function (op, other) {
-        var result = [];
-
-        if (! (other instanceof tree.Color)) {
-            other = other.toColor();
-        }
-
-        for (var c = 0; c < 3; c++) {
-            result[c] = tree.operate(op, this.rgb[c], other.rgb[c]);
-        }
-        return new(tree.Color)(result, this.alpha + other.alpha);
-    },
-
-    toHSL: function () {
-        var r = this.rgb[0] / 255,
-            g = this.rgb[1] / 255,
-            b = this.rgb[2] / 255,
-            a = this.alpha;
-
-        var max = Math.max(r, g, b), min = Math.min(r, g, b);
-        var h, s, l = (max + min) / 2, d = max - min;
-
-        if (max === min) {
-            h = s = 0;
-        } else {
-            s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
-
-            switch (max) {
-                case r: h = (g - b) / d + (g < b ? 6 : 0); break;
-                case g: h = (b - r) / d + 2;               break;
-                case b: h = (r - g) / d + 4;               break;
-            }
-            h /= 6;
-        }
-        return { h: h * 360, s: s, l: l, a: a };
-    },
-    toARGB: function () {
-        var argb = [Math.round(this.alpha * 255)].concat(this.rgb);
-        return '#' + argb.map(function (i) {
-            i = Math.round(i);
-            i = (i > 255 ? 255 : (i < 0 ? 0 : i)).toString(16);
-            return i.length === 1 ? '0' + i : i;
-        }).join('');
-    },
-    compare: function (x) {
-        if (!x.rgb) {
-            return -1;
-        }
-        
-        return (x.rgb[0] === this.rgb[0] &&
-            x.rgb[1] === this.rgb[1] &&
-            x.rgb[2] === this.rgb[2] &&
-            x.alpha === this.alpha) ? 0 : -1;
-    }
-};
-
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Comment = function (value, silent) {
-    this.value = value;
-    this.silent = !!silent;
-};
-tree.Comment.prototype = {
-    toCSS: function (env) {
-        return env.compress ? '' : this.value;
-    },
-    eval: function () { return this }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Condition = function (op, l, r, i, negate) {
-    this.op = op.trim();
-    this.lvalue = l;
-    this.rvalue = r;
-    this.index = i;
-    this.negate = negate;
-};
-tree.Condition.prototype.eval = function (env) {
-    var a = this.lvalue.eval(env),
-        b = this.rvalue.eval(env);
-
-    var i = this.index, result;
-
-    var result = (function (op) {
-        switch (op) {
-            case 'and':
-                return a && b;
-            case 'or':
-                return a || b;
-            default:
-                if (a.compare) {
-                    result = a.compare(b);
-                } else if (b.compare) {
-                    result = b.compare(a);
-                } else {
-                    throw { type: "Type",
-                            message: "Unable to perform comparison",
-                            index: i };
-                }
-                switch (result) {
-                    case -1: return op === '<' || op === '=<';
-                    case  0: return op === '=' || op === '>=' || op === '=<';
-                    case  1: return op === '>' || op === '>=';
-                }
-        }
-    })(this.op);
-    return this.negate ? !result : result;
-};
-
-})(require('../tree'));
-(function (tree) {
-
-//
-// A number with a unit
-//
-tree.Dimension = function (value, unit) {
-    this.value = parseFloat(value);
-    this.unit = unit || null;
-};
-
-tree.Dimension.prototype = {
-    eval: function () { return this },
-    toColor: function () {
-        return new(tree.Color)([this.value, this.value, this.value]);
-    },
-    toCSS: function () {
-        var css = this.value + this.unit;
-        return css;
-    },
-
-    // In an operation between two Dimensions,
-    // we default to the first Dimension's unit,
-    // so `1px + 2em` will yield `3px`.
-    // In the future, we could implement some unit
-    // conversions such that `100cm + 10mm` would yield
-    // `101cm`.
-    operate: function (op, other) {
-        return new(tree.Dimension)
-                  (tree.operate(op, this.value, other.value),
-                  this.unit || other.unit);
-    },
-
-    // TODO: Perform unit conversion before comparing
-    compare: function (other) {
-        if (other instanceof tree.Dimension) {
-            if (other.value > this.value) {
-                return -1;
-            } else if (other.value < this.value) {
-                return 1;
-            } else {
-                return 0;
-            }
-        } else {
-            return -1;
-        }
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Directive = function (name, value) {
-    this.name = name;
-
-    if (Array.isArray(value)) {
-        this.ruleset = new(tree.Ruleset)([], value);
-        this.ruleset.allowImports = true;
-    } else {
-        this.value = value;
-    }
-};
-tree.Directive.prototype = {
-    toCSS: function (ctx, env) {
-        if (this.ruleset) {
-            this.ruleset.root = true;
-            return this.name + (env.compress ? '{' : ' {\n  ') +
-                   this.ruleset.toCSS(ctx, env).trim().replace(/\n/g, '\n  ') +
-                               (env.compress ? '}': '\n}\n');
-        } else {
-            return this.name + ' ' + this.value.toCSS() + ';\n';
-        }
-    },
-    eval: function (env) {
-        var evaldDirective = this;
-        if (this.ruleset) {
-            env.frames.unshift(this);
-            evaldDirective = new(tree.Directive)(this.name);
-            evaldDirective.ruleset = this.ruleset.eval(env);
-            env.frames.shift();
-        }
-        return evaldDirective;
-    },
-    variable: function (name) { return tree.Ruleset.prototype.variable.call(this.ruleset, name) },
-    find: function () { return tree.Ruleset.prototype.find.apply(this.ruleset, arguments) },
-    rulesets: function () { return tree.Ruleset.prototype.rulesets.apply(this.ruleset) }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Element = function (combinator, value, index) {
-    this.combinator = combinator instanceof tree.Combinator ?
-                      combinator : new(tree.Combinator)(combinator);
-
-    if (typeof(value) === 'string') {
-        this.value = value.trim();
-    } else if (value) {
-        this.value = value;
-    } else {
-        this.value = "";
-    }
-    this.index = index;
-};
-tree.Element.prototype.eval = function (env) {
-    return new(tree.Element)(this.combinator,
-                             this.value.eval ? this.value.eval(env) : this.value,
-                             this.index);
-};
-tree.Element.prototype.toCSS = function (env) {
-	var value = (this.value.toCSS ? this.value.toCSS(env) : this.value);
-	if (value == '' && this.combinator.value.charAt(0) == '&') {
-		return '';
-	} else {
-		return this.combinator.toCSS(env || {}) + value;
-	}
-};
-
-tree.Combinator = function (value) {
-    if (value === ' ') {
-        this.value = ' ';
-    } else {
-        this.value = value ? value.trim() : "";
-    }
-};
-tree.Combinator.prototype.toCSS = function (env) {
-    return {
-        ''  : '',
-        ' ' : ' ',
-        ':' : ' :',
-        '+' : env.compress ? '+' : ' + ',
-        '~' : env.compress ? '~' : ' ~ ',
-        '>' : env.compress ? '>' : ' > '
-    }[this.value];
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Expression = function (value) { this.value = value };
-tree.Expression.prototype = {
-    eval: function (env) {
-        if (this.value.length > 1) {
-            return new(tree.Expression)(this.value.map(function (e) {
-                return e.eval(env);
-            }));
-        } else if (this.value.length === 1) {
-            return this.value[0].eval(env);
-        } else {
-            return this;
-        }
-    },
-    toCSS: function (env) {
-        return this.value.map(function (e) {
-            return e.toCSS ? e.toCSS(env) : '';
-        }).join(' ');
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-//
-// CSS @import node
-//
-// The general strategy here is that we don't want to wait
-// for the parsing to be completed, before we start importing
-// the file. That's because in the context of a browser,
-// most of the time will be spent waiting for the server to respond.
-//
-// On creation, we push the import path to our import queue, though
-// `import,push`, we also pass it a callback, which it'll call once
-// the file has been fetched, and parsed.
-//
-tree.Import = function (path, imports, features, once, index) {
-    var that = this;
-
-    this.once = once;
-    this.index = index;
-    this._path = path;
-    this.features = features && new(tree.Value)(features);
-
-    // The '.less' extension is optional
-    if (path instanceof tree.Quoted) {
-        this.path = /\.(le?|c)ss(\?.*)?$/.test(path.value) ? path.value : path.value + '.less';
-    } else {
-        this.path = path.value.value || path.value;
-    }
-
-    this.css = /css(\?.*)?$/.test(this.path);
-
-    // Only pre-compile .less files
-    if (! this.css) {
-        imports.push(this.path, function (e, root, imported) {
-            if (e) { e.index = index }
-            if (imported && that.once) that.skip = imported;
-            that.root = root || new(tree.Ruleset)([], []);
-        });
-    }
-};
-
-//
-// The actual import node doesn't return anything, when converted to CSS.
-// The reason is that it's used at the evaluation stage, so that the rules
-// it imports can be treated like any other rules.
-//
-// In `eval`, we make sure all Import nodes get evaluated, recursively, so
-// we end up with a flat structure, which can easily be imported in the parent
-// ruleset.
-//
-tree.Import.prototype = {
-    toCSS: function (env) {
-        var features = this.features ? ' ' + this.features.toCSS(env) : '';
-
-        if (this.css) {
-            return "@import " + this._path.toCSS() + features + ';\n';
-        } else {
-            return "";
-        }
-    },
-    eval: function (env) {
-        var ruleset, features = this.features && this.features.eval(env);
-
-        if (this.skip) return [];
-
-        if (this.css) {
-            return this;
-        } else {
-            ruleset = new(tree.Ruleset)([], this.root.rules.slice(0));
-
-            for (var i = 0; i < ruleset.rules.length; i++) {
-                if (ruleset.rules[i] instanceof tree.Import) {
-                    Array.prototype
-                         .splice
-                         .apply(ruleset.rules,
-                                [i, 1].concat(ruleset.rules[i].eval(env)));
-                }
-            }
-            return this.features ? new(tree.Media)(ruleset.rules, this.features.value) : ruleset.rules;
-        }
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.JavaScript = function (string, index, escaped) {
-    this.escaped = escaped;
-    this.expression = string;
-    this.index = index;
-};
-tree.JavaScript.prototype = {
-    eval: function (env) {
-        var result,
-            that = this,
-            context = {};
-
-        var expression = this.expression.replace(/@\{([\w-]+)\}/g, function (_, name) {
-            return tree.jsify(new(tree.Variable)('@' + name, that.index).eval(env));
-        });
-
-        try {
-            expression = new(Function)('return (' + expression + ')');
-        } catch (e) {
-            throw { message: "JavaScript evaluation error: `" + expression + "`" ,
-                    index: this.index };
-        }
-
-        for (var k in env.frames[0].variables()) {
-            context[k.slice(1)] = {
-                value: env.frames[0].variables()[k].value,
-                toJS: function () {
-                    return this.value.eval(env).toCSS();
-                }
-            };
-        }
-
-        try {
-            result = expression.call(context);
-        } catch (e) {
-            throw { message: "JavaScript evaluation error: '" + e.name + ': ' + e.message + "'" ,
-                    index: this.index };
-        }
-        if (typeof(result) === 'string') {
-            return new(tree.Quoted)('"' + result + '"', result, this.escaped, this.index);
-        } else if (Array.isArray(result)) {
-            return new(tree.Anonymous)(result.join(', '));
-        } else {
-            return new(tree.Anonymous)(result);
-        }
-    }
-};
-
-})(require('../tree'));
-
-(function (tree) {
-
-tree.Keyword = function (value) { this.value = value };
-tree.Keyword.prototype = {
-    eval: function () { return this },
-    toCSS: function () { return this.value },
-    compare: function (other) {
-        if (other instanceof tree.Keyword) {
-            return other.value === this.value ? 0 : 1;
-        } else {
-            return -1;
-        }
-    }
-};
-
-tree.True = new(tree.Keyword)('true');
-tree.False = new(tree.Keyword)('false');
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Media = function (value, features) {
-    var selectors = this.emptySelectors();
-
-    this.features = new(tree.Value)(features);
-    this.ruleset = new(tree.Ruleset)(selectors, value);
-    this.ruleset.allowImports = true;
-};
-tree.Media.prototype = {
-    toCSS: function (ctx, env) {
-        var features = this.features.toCSS(env);
-
-        this.ruleset.root = (ctx.length === 0 || ctx[0].multiMedia);
-        return '@media ' + features + (env.compress ? '{' : ' {\n  ') +
-               this.ruleset.toCSS(ctx, env).trim().replace(/\n/g, '\n  ') +
-                           (env.compress ? '}': '\n}\n');
-    },
-    eval: function (env) {
-        if (!env.mediaBlocks) {
-            env.mediaBlocks = [];
-            env.mediaPath = [];
-        }
-        
-        var blockIndex = env.mediaBlocks.length;
-        env.mediaPath.push(this);
-        env.mediaBlocks.push(this);
-
-        var media = new(tree.Media)([], []);
-        if(this.debugInfo) {
-            this.ruleset.debugInfo = this.debugInfo;
-            media.debugInfo = this.debugInfo;
-        }
-        media.features = this.features.eval(env);
-        
-        env.frames.unshift(this.ruleset);
-        media.ruleset = this.ruleset.eval(env);
-        env.frames.shift();
-        
-        env.mediaBlocks[blockIndex] = media;
-        env.mediaPath.pop();
-
-        return env.mediaPath.length === 0 ? media.evalTop(env) :
-                    media.evalNested(env)
-    },
-    variable: function (name) { return tree.Ruleset.prototype.variable.call(this.ruleset, name) },
-    find: function () { return tree.Ruleset.prototype.find.apply(this.ruleset, arguments) },
-    rulesets: function () { return tree.Ruleset.prototype.rulesets.apply(this.ruleset) },
-    emptySelectors: function() { 
-        var el = new(tree.Element)('', '&', 0);
-        return [new(tree.Selector)([el])];
-    },
-
-    evalTop: function (env) {
-        var result = this;
-
-        // Render all dependent Media blocks.
-        if (env.mediaBlocks.length > 1) {
-            var selectors = this.emptySelectors();
-            result = new(tree.Ruleset)(selectors, env.mediaBlocks);
-            result.multiMedia = true;
-        }
-
-        delete env.mediaBlocks;
-        delete env.mediaPath;
-
-        return result;
-    },
-    evalNested: function (env) {
-        var i, value,
-            path = env.mediaPath.concat([this]);
-
-        // Extract the media-query conditions separated with `,` (OR).
-        for (i = 0; i < path.length; i++) {
-            value = path[i].features instanceof tree.Value ?
-                        path[i].features.value : path[i].features;
-            path[i] = Array.isArray(value) ? value : [value];
-        }
-
-        // Trace all permutations to generate the resulting media-query.
-        //
-        // (a, b and c) with nested (d, e) ->
-        //    a and d
-        //    a and e
-        //    b and c and d
-        //    b and c and e
-        this.features = new(tree.Value)(this.permute(path).map(function (path) {
-            path = path.map(function (fragment) {
-                return fragment.toCSS ? fragment : new(tree.Anonymous)(fragment);
-            });
-
-            for(i = path.length - 1; i > 0; i--) {
-                path.splice(i, 0, new(tree.Anonymous)("and"));
-            }
-
-            return new(tree.Expression)(path);
-        }));
-
-        // Fake a tree-node that doesn't output anything.
-        return new(tree.Ruleset)([], []);
-    },
-    permute: function (arr) {
-      if (arr.length === 0) {
-          return [];
-      } else if (arr.length === 1) {
-          return arr[0];
-      } else {
-          var result = [];
-          var rest = this.permute(arr.slice(1));
-          for (var i = 0; i < rest.length; i++) {
-              for (var j = 0; j < arr[0].length; j++) {
-                  result.push([arr[0][j]].concat(rest[i]));
-              }
-          }
-          return result;
-      }
-    },
-    bubbleSelectors: function (selectors) {
-      this.ruleset = new(tree.Ruleset)(selectors.slice(0), [this.ruleset]);
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.mixin = {};
-tree.mixin.Call = function (elements, args, index, filename, important) {
-    this.selector = new(tree.Selector)(elements);
-    this.arguments = args;
-    this.index = index;
-    this.filename = filename;
-    this.important = important;
-};
-tree.mixin.Call.prototype = {
-    eval: function (env) {
-        var mixins, args, rules = [], match = false;
-
-        for (var i = 0; i < env.frames.length; i++) {
-            if ((mixins = env.frames[i].find(this.selector)).length > 0) {
-                args = this.arguments && this.arguments.map(function (a) {
-                    return { name: a.name, value: a.value.eval(env) };
-                });
-                for (var m = 0; m < mixins.length; m++) {
-                    if (mixins[m].match(args, env)) {
-                        try {
-                            Array.prototype.push.apply(
-                                  rules, mixins[m].eval(env, this.arguments, this.important).rules);
-                            match = true;
-                        } catch (e) {
-                            throw { message: e.message, index: this.index, filename: this.filename, stack: e.stack };
-                        }
-                    }
-                }
-                if (match) {
-                    return rules;
-                } else {
-                    throw { type:    'Runtime',
-                            message: 'No matching definition was found for `' +
-                                      this.selector.toCSS().trim() + '('      +
-                                      this.arguments.map(function (a) {
-                                          return a.toCSS();
-                                      }).join(', ') + ")`",
-                            index:   this.index, filename: this.filename };
-                }
-            }
-        }
-        throw { type: 'Name',
-                message: this.selector.toCSS().trim() + " is undefined",
-                index: this.index, filename: this.filename };
-    }
-};
-
-tree.mixin.Definition = function (name, params, rules, condition, variadic) {
-    this.name = name;
-    this.selectors = [new(tree.Selector)([new(tree.Element)(null, name)])];
-    this.params = params;
-    this.condition = condition;
-    this.variadic = variadic;
-    this.arity = params.length;
-    this.rules = rules;
-    this._lookups = {};
-    this.required = params.reduce(function (count, p) {
-        if (!p.name || (p.name && !p.value)) { return count + 1 }
-        else                                 { return count }
-    }, 0);
-    this.parent = tree.Ruleset.prototype;
-    this.frames = [];
-};
-tree.mixin.Definition.prototype = {
-    toCSS:     function ()     { return "" },
-    variable:  function (name) { return this.parent.variable.call(this, name) },
-    variables: function ()     { return this.parent.variables.call(this) },
-    find:      function ()     { return this.parent.find.apply(this, arguments) },
-    rulesets:  function ()     { return this.parent.rulesets.apply(this) },
-
-    evalParams: function (env, args) {
-        var frame = new(tree.Ruleset)(null, []), varargs, arg;
-
-        for (var i = 0, val, name; i < this.params.length; i++) {
-            arg = args && args[i]
-
-            if (arg && arg.name) {
-                frame.rules.unshift(new(tree.Rule)(arg.name, arg.value.eval(env)));
-                args.splice(i, 1);
-                i--;
-                continue;
-            }
-			
-            if (name = this.params[i].name) {
-                if (this.params[i].variadic && args) {
-                    varargs = [];
-                    for (var j = i; j < args.length; j++) {
-                        varargs.push(args[j].value.eval(env));
-                    }
-                    frame.rules.unshift(new(tree.Rule)(name, new(tree.Expression)(varargs).eval(env)));
-                } else if (val = (arg && arg.value) || this.params[i].value) {
-                    frame.rules.unshift(new(tree.Rule)(name, val.eval(env)));
-                } else {
-                    throw { type: 'Runtime', message: "wrong number of arguments for " + this.name +
-                            ' (' + args.length + ' for ' + this.arity + ')' };
-                }
-            }
-        }
-        return frame;
-    },
-    eval: function (env, args, important) {
-        var frame = this.evalParams(env, args), context, _arguments = [], rules, start;
-
-        for (var i = 0; i < Math.max(this.params.length, args && args.length); i++) {
-            _arguments.push((args[i] && args[i].value) || this.params[i].value);
-        }
-        frame.rules.unshift(new(tree.Rule)('@arguments', new(tree.Expression)(_arguments).eval(env)));
-
-        rules = important ?
-            this.rules.map(function (r) {
-                return new(tree.Rule)(r.name, r.value, '!important', r.index);
-            }) : this.rules.slice(0);
-
-        return new(tree.Ruleset)(null, rules).eval({
-            frames: [this, frame].concat(this.frames, env.frames)
-        });
-    },
-    match: function (args, env) {
-        var argsLength = (args && args.length) || 0, len, frame;
-
-        if (! this.variadic) {
-            if (argsLength < this.required)                               { return false }
-            if (argsLength > this.params.length)                          { return false }
-            if ((this.required > 0) && (argsLength > this.params.length)) { return false }
-        }
-
-        if (this.condition && !this.condition.eval({
-            frames: [this.evalParams(env, args)].concat(env.frames)
-        }))                                                           { return false }
-
-        len = Math.min(argsLength, this.arity);
-
-        for (var i = 0; i < len; i++) {
-            if (!this.params[i].name) {
-                if (args[i].value.eval(env).toCSS() != this.params[i].value.eval(env).toCSS()) {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Operation = function (op, operands) {
-    this.op = op.trim();
-    this.operands = operands;
-};
-tree.Operation.prototype.eval = function (env) {
-    var a = this.operands[0].eval(env),
-        b = this.operands[1].eval(env),
-        temp;
-
-    if (a instanceof tree.Dimension && b instanceof tree.Color) {
-        if (this.op === '*' || this.op === '+') {
-            temp = b, b = a, a = temp;
-        } else {
-            throw { name: "OperationError",
-                    message: "Can't substract or divide a color from a number" };
-        }
-    }
-    return a.operate(this.op, b);
-};
-
-tree.operate = function (op, a, b) {
-    switch (op) {
-        case '+': return a + b;
-        case '-': return a - b;
-        case '*': return a * b;
-        case '/': return a / b;
-    }
-};
-
-})(require('../tree'));
-
-(function (tree) {
-
-tree.Paren = function (node) {
-    this.value = node;
-};
-tree.Paren.prototype = {
-    toCSS: function (env) {
-        return '(' + this.value.toCSS(env) + ')';
-    },
-    eval: function (env) {
-        return new(tree.Paren)(this.value.eval(env));
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Quoted = function (str, content, escaped, i) {
-    this.escaped = escaped;
-    this.value = content || '';
-    this.quote = str.charAt(0);
-    this.index = i;
-};
-tree.Quoted.prototype = {
-    toCSS: function () {
-        if (this.escaped) {
-            return this.value;
-        } else {
-            return this.quote + this.value + this.quote;
-        }
-    },
-    eval: function (env) {
-        var that = this;
-        var value = this.value.replace(/`([^`]+)`/g, function (_, exp) {
-            return new(tree.JavaScript)(exp, that.index, true).eval(env).value;
-        }).replace(/@\{([\w-]+)\}/g, function (_, name) {
-            var v = new(tree.Variable)('@' + name, that.index).eval(env);
-            return ('value' in v) ? v.value : v.toCSS();
-        });
-        return new(tree.Quoted)(this.quote + value + this.quote, value, this.escaped, this.index);
-    },
-    compare: function (x) {
-        if (!x.toCSS) {
-            return -1;
-        }
-        
-        var left = this.toCSS(),
-            right = x.toCSS();
-        
-        if (left === right) {
-            return 0;
-        }
-        
-        return left < right ? -1 : 1;
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Ratio = function (value) {
-    this.value = value;
-};
-tree.Ratio.prototype = {
-    toCSS: function (env) {
-        return this.value;
-    },
-    eval: function () { return this }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Rule = function (name, value, important, index, inline) {
-    this.name = name;
-    this.value = (value instanceof tree.Value) ? value : new(tree.Value)([value]);
-    this.important = important ? ' ' + important.trim() : '';
-    this.index = index;
-    this.inline = inline || false;
-
-    if (name.charAt(0) === '@') {
-        this.variable = true;
-    } else { this.variable = false }
-};
-tree.Rule.prototype.toCSS = function (env) {
-    if (this.variable) { return "" }
-    else {
-        return this.name + (env.compress ? ':' : ': ') +
-               this.value.toCSS(env) +
-               this.important + (this.inline ? "" : ";");
-    }
-};
-
-tree.Rule.prototype.eval = function (context) {
-    return new(tree.Rule)(this.name,
-                          this.value.eval(context),
-                          this.important,
-                          this.index, this.inline);
-};
-
-tree.Shorthand = function (a, b) {
-    this.a = a;
-    this.b = b;
-};
-
-tree.Shorthand.prototype = {
-    toCSS: function (env) {
-        return this.a.toCSS(env) + "/" + this.b.toCSS(env);
-    },
-    eval: function () { return this }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Ruleset = function (selectors, rules, strictImports) {
-    this.selectors = selectors;
-    this.rules = rules;
-    this._lookups = {};
-    this.strictImports = strictImports;
-};
-tree.Ruleset.prototype = {
-    eval: function (env) {
-        var selectors = this.selectors && this.selectors.map(function (s) { return s.eval(env) });
-        var ruleset = new(tree.Ruleset)(selectors, this.rules.slice(0), this.strictImports);
-        var rules = [];
-        
-        ruleset.root = this.root;
-        ruleset.allowImports = this.allowImports;
-
-        if(this.debugInfo) {
-            ruleset.debugInfo = this.debugInfo;
-        }
-
-        // push the current ruleset to the frames stack
-        env.frames.unshift(ruleset);
-
-        // Evaluate imports
-        if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {
-            for (var i = 0; i < ruleset.rules.length; i++) {
-                if (ruleset.rules[i] instanceof tree.Import) {
-                    rules = rules.concat(ruleset.rules[i].eval(env));
-                } else {
-                    rules.push(ruleset.rules[i]);
-                }
-            }
-            ruleset.rules = rules;
-            rules = [];
-        }
-
-        // Store the frames around mixin definitions,
-        // so they can be evaluated like closures when the time comes.
-        for (var i = 0; i < ruleset.rules.length; i++) {
-            if (ruleset.rules[i] instanceof tree.mixin.Definition) {
-                ruleset.rules[i].frames = env.frames.slice(0);
-            }
-        }
-        
-        var mediaBlockCount = (env.mediaBlocks && env.mediaBlocks.length) || 0;
-
-        // Evaluate mixin calls.
-        for (var i = 0; i < ruleset.rules.length; i++) {
-            if (ruleset.rules[i] instanceof tree.mixin.Call) {
-                rules = rules.concat(ruleset.rules[i].eval(env));
-            } else {
-                rules.push(ruleset.rules[i]);
-            }
-        }
-        ruleset.rules = rules;
-
-        // Evaluate everything else
-        for (var i = 0, rule; i < ruleset.rules.length; i++) {
-            rule = ruleset.rules[i];
-
-            if (! (rule instanceof tree.mixin.Definition)) {
-                ruleset.rules[i] = rule.eval ? rule.eval(env) : rule;
-            }
-        }
-
-        // Pop the stack
-        env.frames.shift();
-        
-        if (env.mediaBlocks) {
-            for(var i = mediaBlockCount; i < env.mediaBlocks.length; i++) {
-                env.mediaBlocks[i].bubbleSelectors(selectors);
-            }
-        }
-
-        return ruleset;
-    },
-    match: function (args) {
-        return !args || args.length === 0;
-    },
-    variables: function () {
-        if (this._variables) { return this._variables }
-        else {
-            return this._variables = this.rules.reduce(function (hash, r) {
-                if (r instanceof tree.Rule && r.variable === true) {
-                    hash[r.name] = r;
-                }
-                return hash;
-            }, {});
-        }
-    },
-    variable: function (name) {
-        return this.variables()[name];
-    },
-    rulesets: function () {
-        if (this._rulesets) { return this._rulesets }
-        else {
-            return this._rulesets = this.rules.filter(function (r) {
-                return (r instanceof tree.Ruleset) || (r instanceof tree.mixin.Definition);
-            });
-        }
-    },
-    find: function (selector, self) {
-        self = self || this;
-        var rules = [], rule, match,
-            key = selector.toCSS();
-
-        if (key in this._lookups) { return this._lookups[key] }
-
-        this.rulesets().forEach(function (rule) {
-            if (rule !== self) {
-                for (var j = 0; j < rule.selectors.length; j++) {
-                    if (match = selector.match(rule.selectors[j])) {
-                        if (selector.elements.length > rule.selectors[j].elements.length) {
-                            Array.prototype.push.apply(rules, rule.find(
-                                new(tree.Selector)(selector.elements.slice(1)), self));
-                        } else {
-                            rules.push(rule);
-                        }
-                        break;
-                    }
-                }
-            }
-        });
-        return this._lookups[key] = rules;
-    },
-    //
-    // Entry point for code generation
-    //
-    //     `context` holds an array of arrays.
-    //
-    toCSS: function (context, env) {
-        var css = [],      // The CSS output
-            rules = [],    // node.Rule instances
-           _rules = [],    //
-            rulesets = [], // node.Ruleset instances
-            paths = [],    // Current selectors
-            selector,      // The fully rendered selector
-            debugInfo,     // Line number debugging
-            rule;
-
-        if (! this.root) {
-            this.joinSelectors(paths, context, this.selectors);
-        }
-
-        // Compile rules and rulesets
-        for (var i = 0; i < this.rules.length; i++) {
-            rule = this.rules[i];
-
-            if (rule.rules || (rule instanceof tree.Directive) || (rule instanceof tree.Media)) {
-                rulesets.push(rule.toCSS(paths, env));
-            } else if (rule instanceof tree.Comment) {
-                if (!rule.silent) {
-                    if (this.root) {
-                        rulesets.push(rule.toCSS(env));
-                    } else {
-                        rules.push(rule.toCSS(env));
-                    }
-                }
-            } else {
-                if (rule.toCSS && !rule.variable) {
-                    rules.push(rule.toCSS(env));
-                } else if (rule.value && !rule.variable) {
-                    rules.push(rule.value.toString());
-                }
-            }
-        } 
-
-        rulesets = rulesets.join('');
-
-        // If this is the root node, we don't render
-        // a selector, or {}.
-        // Otherwise, only output if this ruleset has rules.
-        if (this.root) {
-            css.push(rules.join(env.compress ? '' : '\n'));
-        } else {
-            if (rules.length > 0) {
-                debugInfo = tree.debugInfo(env, this);
-                selector = paths.map(function (p) {
-                    return p.map(function (s) {
-                        return s.toCSS(env);
-                    }).join('').trim();
-                }).join(env.compress ? ',' : ',\n');
-
-                // Remove duplicates
-                for (var i = rules.length - 1; i >= 0; i--) {
-                    if (_rules.indexOf(rules[i]) === -1) {
-                        _rules.unshift(rules[i]);
-                    }
-                }
-                rules = _rules;
-
-                css.push(debugInfo + selector + 
-                        (env.compress ? '{' : ' {\n  ') +
-                        rules.join(env.compress ? '' : '\n  ') +
-                        (env.compress ? '}' : '\n}\n'));
-            }
-        }
-        css.push(rulesets);
-
-        return css.join('')  + (env.compress ? '\n' : '');
-    },
-
-    joinSelectors: function (paths, context, selectors) {
-        for (var s = 0; s < selectors.length; s++) {
-            this.joinSelector(paths, context, selectors[s]);
-        }
-    },
-
-    joinSelector: function (paths, context, selector) {
-
-        var i, j, k, 
-            hasParentSelector, newSelectors, el, sel, parentSel, 
-            newSelectorPath, afterParentJoin, newJoinedSelector, 
-            newJoinedSelectorEmpty, lastSelector, currentElements,
-            selectorsMultiplied;
-    
-        for (i = 0; i < selector.elements.length; i++) {
-            el = selector.elements[i];
-            if (el.value === '&') {
-                hasParentSelector = true;
-            }
-        }
-    
-        if (!hasParentSelector) {
-            if (context.length > 0) {
-                for(i = 0; i < context.length; i++) {
-                    paths.push(context[i].concat(selector));
-                }
-            }
-            else {
-                paths.push([selector]);
-            }
-            return;
-        }
-
-        // The paths are [[Selector]]
-        // The first list is a list of comma seperated selectors
-        // The inner list is a list of inheritance seperated selectors
-        // e.g.
-        // .a, .b {
-        //   .c {
-        //   }
-        // }
-        // == [[.a] [.c]] [[.b] [.c]]
-        //
-
-        // the elements from the current selector so far
-        currentElements = [];
-        // the current list of new selectors to add to the path.
-        // We will build it up. We initiate it with one empty selector as we "multiply" the new selectors
-        // by the parents
-        newSelectors = [[]];
-
-        for (i = 0; i < selector.elements.length; i++) {
-            el = selector.elements[i];
-            // non parent reference elements just get added
-            if (el.value !== "&") {
-                currentElements.push(el);
-            } else {
-                // the new list of selectors to add
-                selectorsMultiplied = [];
-
-                // merge the current list of non parent selector elements
-                // on to the current list of selectors to add
-                if (currentElements.length > 0) {
-                    this.mergeElementsOnToSelectors(currentElements, newSelectors);
-                }
-
-                // loop through our current selectors
-                for(j = 0; j < newSelectors.length; j++) {
-                    sel = newSelectors[j];
-                    // if we don't have any parent paths, the & might be in a mixin so that it can be used
-                    // whether there are parents or not
-                    if (context.length == 0) {
-                        // the combinator used on el should now be applied to the next element instead so that
-                        // it is not lost
-                        if (sel.length > 0) {
-                            sel[0].elements = sel[0].elements.slice(0);
-                            sel[0].elements.push(new(tree.Element)(el.combinator, '', 0)); //new Element(el.Combinator,  ""));
-                        }
-                        selectorsMultiplied.push(sel);
-                    }
-                    else {
-                        // and the parent selectors
-                        for(k = 0; k < context.length; k++) {
-                            parentSel = context[k];
-                            // We need to put the current selectors
-                            // then join the last selector's elements on to the parents selectors
-
-                            // our new selector path
-                            newSelectorPath = [];
-                            // selectors from the parent after the join
-                            afterParentJoin = [];
-                            newJoinedSelectorEmpty = true;
-
-                            //construct the joined selector - if & is the first thing this will be empty,
-                            // if not newJoinedSelector will be the last set of elements in the selector
-                            if (sel.length > 0) {
-                                newSelectorPath = sel.slice(0);
-                                lastSelector = newSelectorPath.pop();
-                                newJoinedSelector = new(tree.Selector)(lastSelector.elements.slice(0));
-                                newJoinedSelectorEmpty = false;
-                            }
-                            else {
-                                newJoinedSelector = new(tree.Selector)([]);
-                            }
-
-                            //put together the parent selectors after the join
-                            if (parentSel.length > 1) {
-                                afterParentJoin = afterParentJoin.concat(parentSel.slice(1));
-                            }
-
-                            if (parentSel.length > 0) {
-                                newJoinedSelectorEmpty = false;
-
-                                // join the elements so far with the first part of the parent
-                                newJoinedSelector.elements.push(new(tree.Element)(el.combinator, parentSel[0].elements[0].value, 0));
-                                newJoinedSelector.elements = newJoinedSelector.elements.concat(parentSel[0].elements.slice(1));
-                            }
-
-                            if (!newJoinedSelectorEmpty) {
-                                // now add the joined selector
-                                newSelectorPath.push(newJoinedSelector);
-                            }
-
-                            // and the rest of the parent
-                            newSelectorPath = newSelectorPath.concat(afterParentJoin);
-
-                            // add that to our new set of selectors
-                            selectorsMultiplied.push(newSelectorPath);
-                        }
-                    }
-                }
-
-                // our new selectors has been multiplied, so reset the state
-                newSelectors = selectorsMultiplied;
-                currentElements = [];
-            }
-        }
-
-        // if we have any elements left over (e.g. .a& .b == .b)
-        // add them on to all the current selectors
-        if (currentElements.length > 0) {
-            this.mergeElementsOnToSelectors(currentElements, newSelectors);
-        }
-
-        for(i = 0; i < newSelectors.length; i++) {
-            paths.push(newSelectors[i]);
-        }
-    },
-    
-    mergeElementsOnToSelectors: function(elements, selectors) {
-        var i, sel;
-
-        if (selectors.length == 0) {
-            selectors.push([ new(tree.Selector)(elements) ]);
-            return;
-        }
-
-        for(i = 0; i < selectors.length; i++) {
-            sel = selectors[i];
-
-            // if the previous thing in sel is a parent this needs to join on to it
-            if (sel.length > 0) {
-                sel[sel.length - 1] = new(tree.Selector)(sel[sel.length - 1].elements.concat(elements));
-            }
-            else {
-                sel.push(new(tree.Selector)(elements));
-            }
-        }
-    }
-};
-})(require('../tree'));
-(function (tree) {
-
-tree.Selector = function (elements) {
-    this.elements = elements;
-};
-tree.Selector.prototype.match = function (other) {
-    var len  = this.elements.length,
-        olen = other.elements.length,
-        max  = Math.min(len, olen);
-
-    if (len < olen) {
-        return false;
-    } else {
-        for (var i = 0; i < max; i++) {
-            if (this.elements[i].value !== other.elements[i].value) {
-                return false;
-            }
-        }
-    }
-    return true;
-};
-tree.Selector.prototype.eval = function (env) {
-    return new(tree.Selector)(this.elements.map(function (e) {
-        return e.eval(env);
-    }));
-};
-tree.Selector.prototype.toCSS = function (env) {
-    if (this._css) { return this._css }
-    
-    if (this.elements[0].combinator.value === "") {
-        this._css = ' ';
-    } else {
-        this._css = '';
-    }
-    
-    this._css += this.elements.map(function (e) {
-        if (typeof(e) === 'string') {
-            return ' ' + e.trim();
-        } else {
-            return e.toCSS(env);
-        }
-    }).join('');
-    
-    return this._css;
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.URL = function (val, paths) {
-    this.value = val;
-    this.paths = paths;
-};
-tree.URL.prototype = {
-    toCSS: function () {
-        return "url(" + this.value.toCSS() + ")";
-    },
-    eval: function (ctx) {
-        var val = this.value.eval(ctx);
-
-        // Add the base path if the URL is relative and we are in the browser
-        if (typeof window !== 'undefined' && typeof val.value === "string" && !/^(?:[a-z-]+:|\/)/.test(val.value) && this.paths.length > 0) {
-            val.value = this.paths[0] + (val.value.charAt(0) === '/' ? val.value.slice(1) : val.value);
-        }
-
-        return new(tree.URL)(val, this.paths);
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Value = function (value) {
-    this.value = value;
-    this.is = 'value';
-};
-tree.Value.prototype = {
-    eval: function (env) {
-        if (this.value.length === 1) {
-            return this.value[0].eval(env);
-        } else {
-            return new(tree.Value)(this.value.map(function (v) {
-                return v.eval(env);
-            }));
-        }
-    },
-    toCSS: function (env) {
-        return this.value.map(function (e) {
-            return e.toCSS(env);
-        }).join(env.compress ? ',' : ', ');
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.Variable = function (name, index, file) { this.name = name, this.index = index, this.file = file };
-tree.Variable.prototype = {
-    eval: function (env) {
-        var variable, v, name = this.name;
-
-        if (name.indexOf('@@') == 0) {
-            name = '@' + new(tree.Variable)(name.slice(1)).eval(env).value;
-        }
-
-        if (variable = tree.find(env.frames, function (frame) {
-            if (v = frame.variable(name)) {
-                return v.value.eval(env);
-            }
-        })) { return variable }
-        else {
-            throw { type: 'Name',
-                    message: "variable " + name + " is undefined",
-                    filename: this.file,
-                    index: this.index };
-        }
-    }
-};
-
-})(require('../tree'));
-(function (tree) {
-
-tree.debugInfo = function(env, ctx) {
-    var result="";
-    if (env.dumpLineNumbers && !env.compress) {
-        switch(env.dumpLineNumbers) {
-            case 'comments':
-                result = tree.debugInfo.asComment(ctx);
-                break;
-            case 'mediaquery':
-                result = tree.debugInfo.asMediaQuery(ctx);
-                break;
-            case 'all':
-                result = tree.debugInfo.asComment(ctx)+tree.debugInfo.asMediaQuery(ctx);
-                break;
-        }
-    }
-    return result;
-};
-
-tree.debugInfo.asComment = function(ctx) {
-    return '/* line ' + ctx.debugInfo.lineNumber + ', ' + ctx.debugInfo.fileName + ' */\n';
-};
-
-tree.debugInfo.asMediaQuery = function(ctx) {
-    return '@media -sass-debug-info{filename{font-family:"' + ctx.debugInfo.fileName + '";}line{font-family:"' + ctx.debugInfo.lineNumber + '";}}\n';
-};
-
-tree.find = function (obj, fun) {
-    for (var i = 0, r; i < obj.length; i++) {
-        if (r = fun.call(obj, obj[i])) { return r }
-    }
-    return null;
-};
-tree.jsify = function (obj) {
-    if (Array.isArray(obj.value) && (obj.value.length > 1)) {
-        return '[' + obj.value.map(function (v) { return v.toCSS(false) }).join(', ') + ']';
-    } else {
-        return obj.toCSS(false);
-    }
-};
-
-})(require('./tree'));
-//
-// browser.js - client-side engine
-//
-
-var isFileProtocol = /^(file|chrome(-extension)?|resource|qrc|app):/.test(location.protocol);
-
-less.env = less.env || (location.hostname == '127.0.0.1' ||
-                        location.hostname == '0.0.0.0'   ||
-                        location.hostname == 'localhost' ||
-                        location.port.length > 0         ||
-                        isFileProtocol                   ? 'development'
-                                                         : 'production');
-
-// Load styles asynchronously (default: false)
-//
-// This is set to `false` by default, so that the body
-// doesn't start loading before the stylesheets are parsed.
-// Setting this to `true` can result in flickering.
-//
-less.async = less.async || false;
-less.fileAsync = less.fileAsync || false;
-
-// Interval between watch polls
-less.poll = less.poll || (isFileProtocol ? 1000 : 1500);
-
-//
-// Watch mode
-//
-less.watch   = function () { return this.watchMode = true };
-less.unwatch = function () { return this.watchMode = false };
-
-if (less.env === 'development') {
-    less.optimization = 0;
-
-    if (/!watch/.test(location.hash)) {
-        less.watch();
-    }
-    var dumpLineNumbers = /!dumpLineNumbers:(comments|mediaquery|all)/.exec(location.hash);
-    if (dumpLineNumbers) {
-        less.dumpLineNumbers = dumpLineNumbers[1];
-    }
-    less.watchTimer = setInterval(function () {
-        if (less.watchMode) {
-            loadStyleSheets(function (e, root, _, sheet, env) {
-                if (root) {
-                    createCSS(root.toCSS(), sheet, env.lastModified);
-                }
-            });
-        }
-    }, less.poll);
-} else {
-    less.optimization = 3;
-}
-
-var cache;
-
-try {
-    cache = (typeof(window.localStorage) === 'undefined') ? null : window.localStorage;
-} catch (_) {
-    cache = null;
-}
-
-//
-// Get all <link> tags with the 'rel' attribute set to "stylesheet/less"
-//
-var links = document.getElementsByTagName('link');
-var typePattern = /^text\/(x-)?less$/;
-
-less.sheets = [];
-
-for (var i = 0; i < links.length; i++) {
-    if (links[i].rel === 'stylesheet/less' || (links[i].rel.match(/stylesheet/) &&
-       (links[i].type.match(typePattern)))) {
-        less.sheets.push(links[i]);
-    }
-}
-
-
-less.refresh = function (reload) {
-    var startTime, endTime;
-    startTime = endTime = new(Date);
-
-    loadStyleSheets(function (e, root, _, sheet, env) {
-        if (env.local) {
-            log("loading " + sheet.href + " from cache.");
-        } else {
-            log("parsed " + sheet.href + " successfully.");
-            createCSS(root.toCSS(), sheet, env.lastModified);
-        }
-        log("css for " + sheet.href + " generated in " + (new(Date) - endTime) + 'ms');
-        (env.remaining === 0) && log("css generated in " + (new(Date) - startTime) + 'ms');
-        endTime = new(Date);
-    }, reload);
-
-    loadStyles();
-};
-less.refreshStyles = loadStyles;
-
-less.refresh(less.env === 'development');
-
-function loadStyles() {
-    var styles = document.getElementsByTagName('style');
-    for (var i = 0; i < styles.length; i++) {
-        if (styles[i].type.match(typePattern)) {
-            new(less.Parser)({
-                filename: document.location.href.replace(/#.*$/, ''),
-                dumpLineNumbers: less.dumpLineNumbers
-            }).parse(styles[i].innerHTML || '', function (e, tree) {
-                var css = tree.toCSS();
-                var style = styles[i];
-                style.type = 'text/css';
-                if (style.styleSheet) {
-                    style.styleSheet.cssText = css;
-                } else {
-                    style.innerHTML = css;
-                }
-            });
-        }
-    }
-}
-
-function loadStyleSheets(callback, reload) {
-    for (var i = 0; i < less.sheets.length; i++) {
-        loadStyleSheet(less.sheets[i], callback, reload, less.sheets.length - (i + 1));
-    }
-}
-
-function loadStyleSheet(sheet, callback, reload, remaining) {
-    var contents  = sheet.contents || {};  // Passing a ref to top importing parser content cache trough 'sheet' arg.
-    var url       = window.location.href.replace(/[#?].*$/, '');
-    var href      = sheet.href.replace(/\?.*$/, '');
-    var css       = cache && cache.getItem(href);
-    var timestamp = cache && cache.getItem(href + ':timestamp');
-    var styles    = { css: css, timestamp: timestamp };
-
-    // Stylesheets in IE don't always return the full path
-    if (! /^[a-z-]+:/.test(href)) {
-        if (href.charAt(0) == "/") {
-            href = window.location.protocol + "//" + window.location.host + href;
-        } else {
-            href = url.slice(0, url.lastIndexOf('/') + 1) + href;
-        }
-    }
-    xhr(sheet.href, sheet.type, function (data, lastModified) {
-        if (!reload && styles && lastModified &&
-           (new(Date)(lastModified).valueOf() ===
-            new(Date)(styles.timestamp).valueOf())) {
-            // Use local copy
-            createCSS(styles.css, sheet);
-            callback(null, null, data, sheet, { local: true, remaining: remaining });
-        } else {
-            // Use remote copy (re-parse)
-            try {
-                contents[href] = data;  // Updating top importing parser content cache
-                new(less.Parser)({
-                    optimization: less.optimization,
-                    paths: [href.replace(/[\w\.-]+$/, '')],
-                    mime: sheet.type,
-                    filename: href,
-                    'contents': contents,    // Passing top importing parser content cache ref down.
-                    dumpLineNumbers: less.dumpLineNumbers
-                }).parse(data, function (e, root) {
-                    if (e) { return error(e, href) }
-                    try {
-                        callback(e, root, data, sheet, { local: false, lastModified: lastModified, remaining: remaining });
-                        removeNode(document.getElementById('less-error-message:' + extractId(href)));
-                    } catch (e) {
-                        error(e, href);
-                    }
-                });
-            } catch (e) {
-                error(e, href);
-            }
-        }
-    }, function (status, url) {
-        throw new(Error)("Couldn't load " + url + " (" + status + ")");
-    });
-}
-
-function extractId(href) {
-    return href.replace(/^[a-z]+:\/\/?[^\/]+/, '' )  // Remove protocol & domain
-               .replace(/^\//,                 '' )  // Remove root /
-               .replace(/\?.*$/,               '' )  // Remove query
-               .replace(/\.[^\.\/]+$/,         '' )  // Remove file extension
-               .replace(/[^\.\w-]+/g,          '-')  // Replace illegal characters
-               .replace(/\./g,                 ':'); // Replace dots with colons(for valid id)
-}
-
-function createCSS(styles, sheet, lastModified) {
-    var css;
-
-    // Strip the query-string
-    var href = sheet.href ? sheet.href.replace(/\?.*$/, '') : '';
-
-    // If there is no title set, use the filename, minus the extension
-    var id = 'less:' + (sheet.title || extractId(href));
-
-    // If the stylesheet doesn't exist, create a new node
-    if ((css = document.getElementById(id)) === null) {
-        css = document.createElement('style');
-        css.type = 'text/css';
-        if( sheet.media ){ css.media = sheet.media; }
-        css.id = id;
-        var nextEl = sheet && sheet.nextSibling || null;
-        document.getElementsByTagName('head')[0].insertBefore(css, nextEl);
-    }
-
-    if (css.styleSheet) { // IE
-        try {
-            css.styleSheet.cssText = styles;
-        } catch (e) {
-            throw new(Error)("Couldn't reassign styleSheet.cssText.");
-        }
-    } else {
-        (function (node) {
-            if (css.childNodes.length > 0) {
-                if (css.firstChild.nodeValue !== node.nodeValue) {
-                    css.replaceChild(node, css.firstChild);
-                }
-            } else {
-                css.appendChild(node);
-            }
-        })(document.createTextNode(styles));
-    }
-
-    // Don't update the local store if the file wasn't modified
-    if (lastModified && cache) {
-        log('saving ' + href + ' to cache.');
-        try {
-            cache.setItem(href, styles);
-            cache.setItem(href + ':timestamp', lastModified);
-        } catch(e) {
-            //TODO - could do with adding more robust error handling
-            log('failed to save');
-        }
-    }
-}
-
-function xhr(url, type, callback, errback) {
-    var xhr = getXMLHttpRequest();
-    var async = isFileProtocol ? less.fileAsync : less.async;
-
-    if (typeof(xhr.overrideMimeType) === 'function') {
-        xhr.overrideMimeType('text/css');
-    }
-    xhr.open('GET', url, async);
-    xhr.setRequestHeader('Accept', type || 'text/x-less, text/css; q=0.9, */*; q=0.5');
-    xhr.send(null);
-
-    if (isFileProtocol && !less.fileAsync) {
-        if (xhr.status === 0 || (xhr.status >= 200 && xhr.status < 300)) {
-            callback(xhr.responseText);
-        } else {
-            errback(xhr.status, url);
-        }
-    } else if (async) {
-        xhr.onreadystatechange = function () {
-            if (xhr.readyState == 4) {
-                handleResponse(xhr, callback, errback);
-            }
-        };
-    } else {
-        handleResponse(xhr, callback, errback);
-    }
-
-    function handleResponse(xhr, callback, errback) {
-        if (xhr.status >= 200 && xhr.status < 300) {
-            callback(xhr.responseText,
-                     xhr.getResponseHeader("Last-Modified"));
-        } else if (typeof(errback) === 'function') {
-            errback(xhr.status, url);
-        }
-    }
-}
-
-function getXMLHttpRequest() {
-    if (window.XMLHttpRequest) {
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-        }
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-}
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-        if (e.extract[i]) {
-            error.push(template.replace(/\{line\}/, parseInt(e.line) + (i - 1))
-                               .replace(/\{class\}/, classname)
-                               .replace(/\{content\}/, e.extract[i]));
-        }
-    };
-
-    if (e.stack) {
-        content += '<br/>' + e.stack.split('\n').slice(1).join('<br/>');
-    } else if (e.extract) {
-        errorline(e, 0, '');
-        errorline(e, 1, 'line');
-        errorline(e, 2, '');
-        content += 'on line ' + e.line + ', column ' + (e.column + 1) + ':</p>' +
-                    '<ul>' + error.join('') + '</ul>';
-    }
-    elem.innerHTML = content;
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-    // CSS for error messages
-    createCSS([
-        '.less-error-message ul, .less-error-message li {',
-            'list-style-type: none;',
-            'margin-right: 15px;',
-            'padding: 4px 0;',
-            'margin: 0;',
-        '}',
-        '.less-error-message label {',
-            'font-size: 12px;',
-            'margin-right: 15px;',
-            'padding: 4px 0;',
-            'color: #cc7777;',
-        '}',
-        '.less-error-message pre {',
-            'color: #dd6666;',
-            'padding: 4px 0;',
-            'margin: 0;',
-            'display: inline-block;',
-        '}',
-        '.less-error-message pre.line {',
-            'color: #ff0000;',
-        '}',
-        '.less-error-message h3 {',
-            'font-size: 20px;',
-            'font-weight: bold;',
-            'padding: 15px 0 5px 0;',
-            'margin: 0;',
-        '}',
-        '.less-error-message a {',
-            'color: #10a',
-        '}',
-        '.less-error-message .error {',
-            'color: red;',
-            'font-weight: bold;',
-            'padding-bottom: 2px;',
-            'border-bottom: 1px dashed red;',
-        '}'
-    ].join('\n'), { title: 'error-message' });
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-    elem.style.cssText = [
-        "font-family: Arial, sans-serif",
-        "border: 1px solid #e00",
-        "background-color: #eee",
-        "border-radius: 5px",
-        "-webkit-border-radius: 5px",
-        "-moz-border-radius: 5px",
-        "color: #e00",
-        "padding: 15px",
-        "margin-bottom: 15px"
-    ].join(';');
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-    if (less.env == 'development') {
-        timer = setInterval(function () {
-            if (document.body) {
-                if (document.getElementById(id)) {
-                    document.body.replaceChild(elem, document.getElementById(id));
-                } else {
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-                }
-                clearInterval(timer);
-            }
-        }, 10);
-    }
-}
-
-// amd.js
-//
-// Define Less as an AMD module.
-if (typeof define === "function" && define.amd) {
-    define("less", [], function () { return less; } );
-}
-})(window);
diff --git a/IPython/frontend/html/notebook/static/js/less/less-1.3.1.min.js b/IPython/frontend/html/notebook/static/js/less/less-1.3.1.min.js
deleted file mode 100755
index 4043d44..0000000
--- a/IPython/frontend/html/notebook/static/js/less/less-1.3.1.min.js
+++ /dev/null
@@ -1,9 +0,0 @@
-//
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this.escaped?this.value:this.quote+this.value+this.quote},eval:function(t){var n=this,r=this.value.replace(/`([^`]+)`/g,function(r,i){return(new e.JavaScript(i,n.index,!0)).eval(t).value}).replace(/@\{([\w-]+)\}/g,function(r,i){var s=(new e.Variable("@"+i,n.index)).eval(t);return"value"in s?s.value:s.toCSS()});return new e.Quoted(this.quote+r+this.quote,r,this.escaped,this.index)},compare:function(e){if(!e.toCSS)return-1;var t=this.toCSS(),n=e.toCSS();return t===n?0:t<n?-1:1}}}(n("../tree")),function(e){e.Ratio=function(e){this.value=e},e.Ratio.prototype={toCSS:function(e){return this.value},eval:function(){return this}}}(n("../tree")),function(e){e.Rule=function(t,n,r,i,s){this.name=t,this.value=n instanceof e.Value?n:new e.Value([n]),this.important=r?" 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this._rulesets?this._rulesets:this._rulesets=this.rules.filter(function(t){return t instanceof e.Ruleset||t instanceof e.mixin.Definition})},find:function(t,n){n=n||this;var r=[],i,s,o=t.toCSS();return o in this._lookups?this._lookups[o]:(this.rulesets().forEach(function(i){if(i!==n)for(var o=0;o<i.selectors.length;o++)if(s=t.match(i.selectors[o])){t.elements.length>i.selectors[o].elements.length?Array.prototype.push.apply(r,i.find(new e.Selector(t.elements.slice(1)),n)):r.push(i);break}}),this._lookups[o]=r)},toCSS:function(t,n){var r=[],i=[],s=[],o=[],u=[],a,f,l;this.root||this.joinSelectors(u,t,this.selectors);for(var c=0;c<this.rules.length;c++)l=this.rules[c],l.rules||l instanceof e.Directive||l instanceof e.Media?o.push(l.toCSS(u,n)):l instanceof e.Comment?l.silent||(this.root?o.push(l.toCSS(n)):i.push(l.toCSS(n))):l.toCSS&&!l.variable?i.push(l.toCSS(n)):l.value&&!l.variable&&i.push(l.value.toString());o=o.join("");if(this.root)r.push(i.join(n.compress?"":"\n"));else 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i=0;i<r;i++)if(this.elements[i].value!==e.elements[i].value)return!1;return!0},e.Selector.prototype.eval=function(t){return new e.Selector(this.elements.map(function(e){return e.eval(t)}))},e.Selector.prototype.toCSS=function(e){return this._css?this._css:(this.elements[0].combinator.value===""?this._css=" ":this._css="",this._css+=this.elements.map(function(t){return typeof t=="string"?" 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\ No newline at end of file
diff --git a/IPython/frontend/html/notebook/templates/notebook.html b/IPython/frontend/html/notebook/templates/notebook.html
index e4d7ea3..bd4ca9e 100644
--- a/IPython/frontend/html/notebook/templates/notebook.html
+++ b/IPython/frontend/html/notebook/templates/notebook.html
@@ -185,7 +185,7 @@ data-notebook-id={{notebook_id}}
 {% block script %}
 
 {% if use_less %}
-<script src="{{ static_url("js/less/less-1.3.1.min.js") }}" charset="utf-8"></script>
+<script src="{{ static_url("components/less.js/dist/less-1.3.3.min.js") }}" charset="utf-8"></script>
 {% endif %}
 
 <script src="{{ static_url("codemirror/lib/codemirror.js") }}" charset="utf-8"></script>