Removing unused variable from recent word cloud updates

Revert pa11ycrawler back to 1.3.0

Merging rc/2016-08-31 into master

Update to latest `django-debug-toolbar`

Release Candidate rc/2016-08-30

DOC-2546: Remove refs to Hangouts; fix RTD URLs

AC-570 courseware search contrast enhancement

Current Grade Rest API implementation

pa11ycrawler 1.4.0

Also make sure we set the recommended settings according to
<https://django-debug-toolbar.readthedocs.io/en/stable/installation.html#explicit-setup>

Improve logging for email sending while registering.

Better instructions about who to ping for requirements changes

Deserialize BlockRecord.locator into a real BlockUsageLocator

Fixed Shift-Tab on menu and ARIA roles, groups

Fix discussion color contrast and remove gradients

TNL-5163

Fix spelling of permission.

Allow for site override of EDITABLE_SHORT_DESCRIPTION setting

We already have logic to serialize BUL objects to string on save,
but the corresponding deserialization logic was missing.

pa11ycrawler 1.3.0

Merge pull request #13314 from edx/tasawer/bugfix/ecom-5301-hyperlink-fixed-to-be-accessed-with-keyboard

Heperlink changed to button to be accessed with keyboard users

Adjust safe templates thresholds.

Fix typo in class name, remove incorrect class.

ECOM-5301

Fix TNL-5249: inconsistent state in discussions UI

Fix platform API documentation build

Fix the edx-documentation link

AC-566 fixing contrast for copyright