Commenting out a flaky acceptance test.

Fix incorrect parse of url in video_module.py

1. In video_module.py, rewrite the get_ext() function to use the built-in urlparse module to parse the input filename first and then get the file's extension name from the parsed path.
2. In test_video.py, add two test cases (one with query string while the other without) in order to test the rewritten get_ext() function.

Removed unused code that is over 2 years old.

added loading pattern to studio

use unicode strings for slug and regex

Fix image mapped inputs.

Video: Fix flaky acceptance test.

Simple email checking for batch enrollment on inst dash

STUD-1433

Removed circuit editor setup code that had always been in codemirror-compressed.js

LMS-2244

Update XBlock to latest version

codemirror-compressed.js

Remove course name from page H1, and slightly improve sequence navigation

Fix pylint disable pragmas that were pep8 violations

FIX - LMS: Courseware Content Background Color/Height in IE

Video: Add highlighting of start/end time field when clicking into it.

Fixed HTML tab in bulk email feature on firefox.

Answer checks should offer feedback to assistive tech. This commit adds

a page level javascript SR object to enable reading of alert messages.
LMS-2158

LMS-2275

Replaces print statement in django_comment_client with unicode log.debug.

Fixed assigning forum roles from beta dashboard membership.

Removed tooltip from captions. [BLD-629]

LMS-2346

UX-53

Added pretty-printed JSON examples for DOC-168, fixed rst subheadings

Fixes LMS-2352 by unifying :hover and :focus styles.

Valera/add timeout china

The availability of the YouTube API will be stored in student's settings.
The YouTube API is loaded asynchronously now, so no need to pass a
parameter to the front-end telling it if YouTube API should not be loaded
because of it's unavailability.

Removing loading of YouTube API from Studio RequireJS config. Now loading
of YouTube API is handled by Video module.

BLD-531.