Release Candidate rc/2016-06-28

https://openedx.atlassian.net/browse/TNL-4865
Without this change, we get 500 errors when the server tries to
deserialize cached data using a previous data structure.

TNL-4853

Grading followup

Merge patch-2016-06-22 release to master

Upgrade edx-oauth2-provider to v1.1.3

Convert to tag syntax for version

1. update query counts with more accuracy
2. don't use defaultdict in block_structure

Grading uses Block Transformers

AC-484 changing aria- to data-, a to button

Patch Release 2016-06-22

Fixed test default sort preference failing on chrome

Use SVG cert icon for program detail page certificate section

Allows staff using "view as specific student" mode to bypass edx-proctoring
hiding special exams from students, to allow for more useful debugging.

Includes "shim" pattern library implementation of alerts, and a bokchoy
test for this functionality.

Part of ECOM-4224.

Add back and fix missing discussion Jasmine tests

Edited docstring to have URL match urls.py