fix enrollment issue in instructor dash (ECOM-776)
variable name error

The variable name --- `dist` error
`dist` = {}  will cover `dist = grades.answer_distributions(course.id)`
fix preview link generation for course reruns (PLAT-336)
Add back end for Studio video upload feature

This feature allows upload of video assets to S3. This requires that the
VIDEO_UPLOAD_PIPELINE setting be properly configured and that each
course be configured with a token issued by the media team for their
processing purposes (e.g. linking the video with a YouTube channel).

Co-authored-by: Greg Price <gprice@edx.org>
Add front end for Studio video upload feature

Co-authored-by: Chris <crodriguez@edx.org>
Co-authored-by: Mark Hoeber <hoeber@edx.org>
Studio video upload feature template and styling

Co-authored-by: Greg Price <gprice@edx.org>
also apply sorting rules overrides to the /courses view
Merge pull request #6257 from edx/mobile/video-pipeline-squashed

Add video upload feature to Studio
Merge pull request #6262 from edx/cdodge/also-sort-in-courses-list

also apply sorting rules overrides to the /courses view
Update translations (autogenerated message)
Merge pull request #6265 from edx/sarina/2014-12-15-translations-updates

Update translations (autogenerated message)
Hook up new payment/verification flow to dashboard, track selection page, and upgrade
for tests change the default xml data dir to a place where it will get cleaned up
Added test for OpenAssessmentBlock mixin.
TNL-1022
update ora version
Preserve the contribution amount specified on the track selection page.
Studio render XBlockAside views
PLAT-280
WL-172 Show a Order History list on the Student Dashboard for any PaidCourseRegistration or RegCodeItem that the user might have purchased
Split payment/verification business intelligence analytics

Track verify now and verify later choices, image captures, image retake, and name changes, as well as virtual pageviews for every step in the new flow(s).
Merge pull request #6291 from edx/hotfix/2014-12-17

Hotfix/2014 12 17