Changelog updated

documentation/changelog.html

@@ -36,6 +36,7 @@
   <li>Fixed bug in QTI import (private task BT#1368)</li>
   <li>Added more quality at the icons</li>
   <li>Fixed an encoding problem about database connection which is specific to Chinese language. The initial solution has been proposed by Oliver Corre (Bug #1802)</li>
+  <li>Attendance: Adding sticky header for the attendance sheet BT#</li>
   <li>Multiple URL feature: Fixed Course user list (BT#1547) </li>  
   <li>Multiple URL feature: Fixed User List options when adding courses, users, sessions see BT#1470 </li>
   <li>Multiple URL feature: System Announcements and Global agenda now are filtered by URL see BT#1441</li>
@@ -46,7 +47,9 @@
   <li>Exercises: Support UTC dates for time control and Exercise time limits see #2075</li>
   <li>Exercises: Time control bugs fixed #2069</li>
   <li>Exercises: Question order in results fixed #2073</li>
-  <li>Exercises: Fixing question list order #2075</li>    
+  <li>Exercises: Fixing question list order #2075</li>
+  <li>Exercises: Allowing duplicate an exercise within a session BT#1647</li>
+  <li>Documents: Fixing coach and students in a session permissions BT#1652</li>    
   <li>Learning Path: Teachers can reset LP results see #2024</li>    
   <li>Profile: Deleting production user's files fixed see #1682</li>
   <li>Installation: Tracking will be always enabled #2066</li>