Add unit test for updating forum comment
Disable another video test that failed intermittently in master
Rollback Django Debug Toolbar from 1.0.1 to 0.9.4

Due to issues with require.js and the latest version of the toolbar.
Also included a note in the requirements file explaining the situation, and what
needs to happen before this can be upgrade properly.
Add label information to problem types
Add new screen shots
Add label information to Appendix E
Added drafts for speed_change_video and seek_video event types
Changed scrollbar to playback bar per Carlos
Added change log for the Data Formats part of the guide
Clarified historical effect of the speed_change_video event type
image annotation