release candidate improvements

Ignore collection config arg which other mongo connectors use.

Attach image_input_click function to window object

Fix error when reading tokens on aws configuration

Fixed navigation acceptance test

So other parts of the page can access it

Fix `rake lms[cms.dev]`

The default value was removed from common.

Christina/changelog

Added back on hover CC button functionality.

STUD-590

Configure MathJax using require.js

Disable jquery animations to fix LMS navigation acceptance test.

E0d/config fix

Commiting Gemfile.lock to the repository

Include tail from header tag in course update.

Temporarily disable navigation feature due to flakiness.

Add an XBlock javascript runtime, and use it to run XModules

The error was caused by the CONFIG_ROOT environmental variable,
which was incorrectly assumed to be a path.py valid path.

Caption functionality announced when tabbing to list

Remove pipeline config not needed with RequireJS.

[LMS-57]

Zero Tolerance