Make paver respect NO_PREREQ_INSTALL

Fix the chinese name of chinese language in common.py

Update translations (autogenerated message)

Update reference to the xblock-mentoring repo for optimized dataexport

Update course_about.html

This reverts commit b4ba04ba.

This reverts commit 1ed167d9.

Alex/multiple transcripts editor

Fix donwload subs for non youtube videos and non-en language - continue.
Add acceptance tests.
Add detetion of assets on request.
Updated docstring.
Add fixes and acceptance tests.
Fix acceptance tests.
Update docsrtings and cleanup code, resful for language_id.
Specify exception type in POST.
Fix url in upload module.
Improve exception handling.
Remove 'en' and catching in editable_metadata.
Move descriptor.get_context test to lms tests.
Add query parameter to translation dispatch.
Response to format parameter of translatin GET request.
Fix Acceprance test: Metadata Editor.
move handlers to proper scores.
Split video player into smaller files.
Add ugettext and fix typoes.
Add changelog.
Support for downloading non-ascii filenames.
Change event binding.
Add content-language to download requests.
Reractor POST handler to not update self.transcripts.

Ahodges/documentation/answerdist

Update Translation documentation

Add acceptance test for blocked YouTueb API with HTML5 sources

raise ItemNotFoundError if course not found in modulestore (course_listing) 

When the video has both YouTube IDs and HTML5 sources, and
the YouTube API is blocked, then HTML5 sources should be
used.

Fixed legacy dash numeric placeholders with named.

STUD-1455

Internationalized open ended panel headings.

LMS-2169

Conflicts:
	lms/djangoapps/courseware/features/video.feature

Valera/fix multiple videos on page release

Part of BLD-972.

If there are several videos on page, make sure that
the global onYouTubeIframeAPIReady function is properly
setup so that all callbacks are trigerred when the YouTube API
loads.

BLD-972

The new ref is gsehub/xblock-mentoring@43aa320

Optimize mentoring-dataexport times by using values_list()

Add metrics to comment_client requests

Add datadog metrics logging for django model creates, updates, and deletes

Disable failing video test

Markhoeber/documentation/doc 105

DOC-105

Adam/merge release 2

Temporarily disable the bok-choy test that is intermittently failing

AN-167 New chapter on role & skills of data czar and research team