[svn r18275] minor-added information of social tool-(partial FS#3383)

documentation/changelog.html

@@ -84,6 +84,7 @@
   <li>Improved Survey export (SVN#17927)</li>
   <li>Students can now view their uploaded works in Work tool (FS#3486)</li>  
   <li>Implemented add to calendar an assignment with the date when it is completely closed, also when you remove it from assignment tool, it's removed into calendar too, the same case when it's edited, for that I had to change the value of add_calendar field into student_publication_assignment table, now when it's sent to calendar this value is the  id into calendar_event table, instead this value is 0.</li>
+  <li>added social tool - (partial FS#3383)</li>
 </ul>
 <br />
 <h3>Debugging</h3>