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
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
Merge pull request #6291 from edx/hotfix/2014-12-17

Hotfix/2014 12 17
Update AUTHORS
Update AUTHORS
Updating the design of the DRF views for enrollments.

Consolidate PUT and POST on the RESTful Layer.

Change URLs for API

Test cleanup.

Adding a course details URL to the enrollment API.

Change student to user

Change to v1, remove feature flag from API URLs

Updating student to user in tests

Re-ordering redirect urls to be evaluated last.

Adding pagination and testing.

Adding Django REST settings for pagination.

Revert "Re-ordering redirect urls to be evaluated last."

This reverts commit 4c9502daa383e49b46f8abec5456c271e5e24ccb.

Re-ordering redirect urls to be evaluated last.

Conflicts:
	common/djangoapps/enrollment/urls.py

Revert "Adding Django REST settings for pagination."

This reverts commit 9f8a54c41f34caa24818c88f1e75ac59f6ce5259.

Conflicts:
	common/djangoapps/enrollment/urls.py

Revert "Adding pagination and testing."

This reverts commit 0b2d46262abb78f5ad170700205e7fd28b6af942.

Additional testing, logging, and error messages.