Resolve issues with release 2015-09-15 merge to master

Hotfix/2015 09 16

SOL-1193: moved variables from template to view

- Updated checkout page to disallow purchase of credit seats (the credit payment page is hosted in ecommerce)
- Corrected path to providers endpoint
- Cleaned receipt page styling
- Updated receipt page copy
- Added provider thumbnail to receipt page

ECOM-2172

Rc/2015 09 15

Mako comments have to be double-hash, or they are included on the page.

fixed broken tests and quality violations

moved twitter_url to view also

escaped string for js

Add management command for granting superuser access

Bok-choy rebalance. Shard 5 is getting long comparatively.

Fix Translator comment syntax in Mako templates [TNL-3277]

Adam/patch rc with fix to fix not found

(PLAT-835)
(TNL-844)

Remove membership field from team serializer in the membership list endpoint.

Fix Mathjax rendering bug

Internationalize course re-run strings

TNL-3281

mattdrayer/signatory-title-textarea: Increase form input limit to 106…

Allows username and user email to be sent to an LTI.

Watch and process xmodule assets

Removing extraneous IE search clear button

Make studio forgot password link focusable

SOL-449: Flaky Milestones acceptance test

Refactor the test_crud file.

mattdrayer/signatory-title-length: Bump to 106 characters