Updated documents for 0.6.8

Author: rozza

_includes/themes/mongoengine/default.html

@@ -33,7 +33,7 @@
           <ul class="nav">
             <li><a href="/" class="first">Home</a></li>
             <li><a href="#getting-started">Getting Started</a></li>
-            <li><a href="#documentation">Documentation</a></li>
+            <li><a href="http://bit.ly/mongoengine-docs">Documentation</a></li>
             <li><a href="#source">Source</a></li>
             <li><a href="#community">Community</a></li>
           </ul>

_includes/themes/mongoengine/frontpage.html

@@ -51,6 +51,10 @@ <h1 class="logo">MongoEngine</h1>
 {% endhighlight %}
       </div>
       <div class="tab-pane" id="announcements">
+          <h3>v0.6.8 Released</h3>
+          <p>
+            Multiple minor fixes and added choices to GenericEmbeddedDocuments and GenericReferences.  See the <a href="http://readthedocs.org/docs/mongoengine-odm/en/latest/changelog.html#changes-in-0-6-8">change log</a> for a full list of changes.
+          </p>
           <h3>v0.6.7 Released</h3>
           <p>
             Fixes for replicaset connections and read preferences now supported.