Updated docs to link to Stack Overflow as a support channel.

chrome/common/extensions/docs/static/docs.html

 <div id="pageData-name" class="pageData">Hello There!</div>
 
 <p>
 This documentation tells you how to write extensions
 and packaged apps for the
 <a href="http://www.google.com/chrome">Google Chrome browser</a>.
 Because extensions came first,
 the APIs and these docs say <em>extension</em> everywhere.
 </p>
 
@@ skipping 25 matching lines @@
 </p>
 
 <ul>
   <li>
     <a href="devguide.html">Developer's Guide</a>
   </li>
   <li>
     <a href="samples.html">Samples</a>
   </li>
   <li>
+    <a href="http://stackoverflow.com/questions/tagged/google-chrome-extension">Stack Overflow [google-chrome-extension] tag</a>
+  </li>
+  <li>
     <a href="http://groups.google.com/a/chromium.org/group/chromium-extensions">Group: chromium-extensions</a>
   </li>
   <li>
     <a href="http://chrome.google.com/webstore">Chrome Web Store</a>
   </li>
   <li>
     <a href="http://code.google.com/chrome/webstore/">Chrome Web Store
       developer documentation</a>
   </li>
 </ul>
@@ skipping 77 matching lines @@
       but haven't been integrated into it yet.
 
       <p>
       <strong>Note:</strong>
       The trunk version of the doc is preliminary and might have errors.
       </p>
     </td>
   </tr>
 </table>
 </p>