wiki middleware fix (LMS-2461)

Revert to older version of TinyMCE.

We had trouble with Cloudfront/hashed files and need more time
to investigate.
This reverts commit e8f53ac9dc6d8a1d9928787635c7c5f7e409a9ec.

Concept XBlock prototype

Test environment taking a little longer than expect. Jarv said okay to merge, so merging, 

Update translations (autogenerated message)

Install new ORA (edx-tim)

Fix typo in studio's email text

Support for displaying submissions API scores in Progress page.

Clean up references to answer distribution-like things

The right parenthesis should be appeared before the method '.format', not after.

Remove duplicate code in transcripts_ajax.

remove course location from loc_mapper on delete

In the near future an answer distribution report will be displayed in the data download reports table.  In order to avoid confusion, we need to clean up several misleading labels and remove a redundant feature.

Note that the redundant feature is surrounded by a feature flag so that it can be disabled once the report goes live in the table.

Fixes: AN-694

fix typo in data download tab (LMS-2441)

Fixes BLD-948 by escaping messages from xqueue, preventing malformed

html from getting onto the page. The client will then unescape the html
and display it.

More helpful UX in beta membership widget

032414 Language update

Moved all YouTube related URLs to a separate namespace.

All YouTube urls are defined on backend side.

Fix typo in transcripts_utils.

LMS-2262

Add a loading indicator to the Files & Uploads page.

Upgrade TinyMCE and switch to CodeMirror plugin

Unicode strings for server error page

Updates for DOC-83, new SQL table and event types for A/B testing

Code editor button no longer shows an icon, and code style toolbar button location has moved.