because keys are immutable

Remove course_from_id
don't fetch whole course when the root will do
don't fetch even the root if the id will do
check for definition.data == null

Conflicts:
	cms/djangoapps/contentstore/tests/test_course_listing.py

Redirect most studio access through draft modulestore

rather than have caller figure out whether to call draft or direct.
Fixes get_children to always find draft children in studio.
STUD-1662

Sarina/opaque keys cleanup

Update translations

Add the needed wait for ajax statements to checklist acceptance test methods

Add 'roles' endpoint to user_api

ORA2 release-2014-05-23T16.59

Hide beta dash Analytics tab behind feature flag

Expose a new endpoint to query a list of users based on a
role name (Moderator, Student, etc.) and a course_id.

This will initially be used by the notifier to send daily digest
messages to forum moderators.

Installing Image Annotation Tool for Upcoming June 2014 Course