doc: add Cloud9 links to docs

doc/community/index.html

@@ -51,6 +51,8 @@
                       <h2 class="documentation">Documentation</h2>
 
                           <p><a href="http://nodejs.org/api">Official API docs</a> detail the node API.</p>
+                          <p><a href="http://www.nodemanual.org">Node Manual</a> offers stylized API docs, as well as tutorials and live code samples</p>
+                          <p><a href="http://www.nodebits.org">Node Bits</a> provides sample Node.js projects</p>
                           <p><a href="http://docs.nodejitsu.com/">docs.nodejitsu.com</a> answers many of the common problems people come across.</p>
                           <p><a href="http://howtonode.org/">How To Node</a> has a growing number of useful tutorials.</p> 
                           <p><a href="http://stackoverflow.com/questions/tagged/node.js">Stack Overflow node.js tag</a> collects new information every day.</p>