Missing "_()" in course_module.py
Merge pull request #4287 from louyihua/localization-cms

Missing "_()" in course_module.py
Update AUTHORS
skipping update assets, not just collectstatic, in unit tests
Fixes has_changes to search all the way to leaf nodes
Add openedx-analytics discussion group to CONTRIBUTING file
Replace unit page with the container page.

STUD-1754
New Publishing controls on Unit page.

STUD-1707
cleanup of unit, container, and xblock sass; added modules and layout sass; publishing states and actions on new unit
New publishing controls on unit page (continued)

STUD-1707