use less as a component

IPython/frontend/html/notebook/notebookapp.py

@@ -353,7 +353,11 b' 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 "

IPython/frontend/html/notebook/templates/notebook.html

@@ -185,7 +185,7 b' 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>