Adding sidebar items for github repo and annotated source, as well as…

… a reference to Backbone's license file to documentation.

index.html

@@ -200,6 +200,10 @@
     <a class="toc_title" href="#">
       Backbone.js <span class="version">(0.9.1)</span>
     </a>
+    <ul class="toc_section">
+      <li>➢ <a href="http://github.com/documentcloud/backbone">github repo</a></li>
+      <li>– <a href="docs/backbone.html">annotated source</a></li>
+    </ul>
 
     <a class="toc_title" href="#introduction">
       Introduction
@@ -413,6 +417,7 @@
       an <a href="examples/todos/index.html">example application</a>,
       a <a href="https://github.com/documentcloud/backbone/wiki/Tutorials%2C-blog-posts-and-example-sites">list of tutorials</a>
       and a <a href="#examples">long list of real-world projects</a> that use Backbone.
+      Backbone is available for use under the <a href="http://github.com/documentcloud/backbone/blob/master/LICENSE">MIT software license</a>.
     </p>
 
     <p>