pause_video event does not emit when a video ends

Tweaked names of badge events.

MA-661: Clee/discussion api delete thread

TNL-1891 Browse Teams: Category Subnavigation

Reducing size of error message heading

Refactor and merge CourseViewType and CourseTab.

Improve README for openedx directory

TNL-2321

Introduces a tabbed view component which displays its subviews and
handles Backbone navigation between each tab. This is used to implement
the "My Teams" and "Browse" areas of the Teams tab. Right now the
content of both tabs is stubbed out with a placeholder view which should
be replaced by TNL-1893 and TNL-1892.

DOC: Finalize Help targets, sidebar text for Studio Certificates page

Update edx-search dependency to reference latest edx-search

Use Django 1.4 @ensure_csrf_cookie method PLAT-664

Default to filestorage when S3 isn't configured (aws.py) - SOL-963

Update XBlock dependency to use the merged commit from the edx repo

Also moves the default icons to the badges subfolder to avoid storage conflicts.

(WIP) SOL-961 Student Generated Certificate Flow  shows "download" certificate

Follow imports order guidelines.

Skip test that has become too flaky. SOL-449.

www.stage.edx.org is our Drupal site

mattdrayer/SOL-947: Refactor Web/HTML certificate URL patterns

Fix self-paced badge naming.

Add thread voting to discussion API

Change name of section from Sales to Course Seat Purchases

Update translations (autogenerated message)

Add ability to follow a thread in discussion API