hgweb, spartan: add "URL breadcrumbs"

This change adds a "URL breadcrumb"  to the "title" of the pages on the spartan
template. By title I mean the first line that is shown right below the page
selection row, which shows the name of the page that is being viewed, along with
some additional information.

In doing so it standarizes those "titles" which now follow the pattern:

URL breadcumb / page details

mercurial/templates/spartan/branches.tmpl

@@ -18,7 +18,7 b''
 <a type="application/atom+xml" href="{url}atom-branches">atom</a>
 </div>
 
-<h2>branches:</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / branches</h2>
 
 <ul id="tagEntries">
 {entries%branchentry}

mercurial/templates/spartan/changelog.tmpl

@@ -19,7 +19,7 b''
 <a type="application/atom+xml" href="{url}atom-log" title="Atom feed for {repo|escape}">atom</a>
 </div>
 
-<h2>changelog for {repo|escape}</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / changelog</h2>
 
 <form action="{url}log">
 {sessionvars%hiddenformentry}

mercurial/templates/spartan/changeset.tmpl

@@ -15,7 +15,7 b''
 <a href="{url}help{sessionvars%urlparameter}">help</a>
 </div>
 
-<h2>changeset: {desc|strip|escape|firstline|nonempty}</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / changeset: {desc|strip|escape|firstline|nonempty}</h2>
 
 <table id="changesetEntry">
 <tr>

mercurial/templates/spartan/fileannotate.tmpl

@@ -17,7 +17,7 b''
 <a href="{url}help{sessionvars%urlparameter}">help</a>
 </div>
 
-<h2>Annotate {file|escape}</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / annotate {file|escape}</h2>
 
 <table>
 <tr>

mercurial/templates/spartan/filediff.tmpl

@@ -17,7 +17,7 b''
 <a href="{url}help{sessionvars%urlparameter}">help</a>
 </div>
 
-<h2>{file|escape}</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / {file|escape}</h2>
 
 <table id="filediffEntry">
 <tr>

mercurial/templates/spartan/filelog.tmpl

@@ -20,7 +20,7 b''
 <a type="application/atom+xml" href="{url}atom-log/tip/{file|urlescape}" title="Atom feed for {repo|escape}:{file}">atom</a>
 </div>
 
-<h2>{file|escape} revision history</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / {file|escape} revision history</h2>
 
 <p>navigate: <small class="navigate">{nav%filenav}</small></p>
 

mercurial/templates/spartan/filerevision.tmpl

@@ -17,7 +17,7 b''
 <a href="{url}help{sessionvars%urlparameter}">help</a>
 </div>
 
-<h2>{file|escape}</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / {file|escape}</h2>
 
 <table>
 <tr>

mercurial/templates/spartan/graph.tmpl

@@ -17,7 +17,7 b''
 <a href="{url}help{sessionvars%urlparameter}">help</a>
 </div>
 
-<h2>graph</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / graph</h2>
 
 <form action="{url}log">
 {sessionvars%hiddenformentry}

mercurial/templates/spartan/manifest.tmpl

@@ -14,7 +14,7 b''
 <a href="{url}help{sessionvars%urlparameter}">help</a>
 </div>
 
-<h2>files for changeset {node|short}: {path|escape}</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / files for changeset {node|short}: {path|escape}</h2>
 
 <table cellpadding="0" cellspacing="0">
 <tr class="parity{upparity}">

mercurial/templates/spartan/shortlog.tmpl

@@ -19,7 +19,7 b''
 <a type="application/rss+xml" href="{url}atom-log" title="Atom feed for {repo|escape}">atom</a>
 </div>
 
-<h2>shortlog for {repo|escape}</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / shortlog</h2>
 
 <form action="{url}log">
 {sessionvars%hiddenformentry}

mercurial/templates/spartan/tags.tmpl

@@ -18,7 +18,7 b''
 <a type="application/atom+xml" href="{url}atom-tags">atom</a>
 </div>
 
-<h2>tags:</h2>
+<h2><a href="/">Mercurial</a> {pathdef%breadcrumb} / tags</h2>
 
 <ul id="tagEntries">
 {entries%tagentry}