Remove usernames as Unicode use example
Missed edits from Rachel
Merge pull request #64 from edx/ahodges/video_fixup

Missed edits from Rachel
Merge pull request #65 from edx/carol/docs/DOC-1221B

Remove usernames as Unicode use example
Release notes 12-16-14
Merge pull request #66 from edx/markhoeber-doc1354

Release notes 12-16-14
Start making preliminary changes

Changes to cohort overview and discussions to prepare for cohorted
courseware
1st pass edits to existing Content Experiments doc

refer to “experiment groups” instead of groups
update for UI changes where known
fix typos