Export asset attrs to a policy file

Even though xml based courses will ignore.

Jkarni/feature/middleware locked assets

Speed up lms acceptance tests

Update event doc from wiki

Zoldak/xunit acceptance reports

Refactor rake tasks for acceptance tests
Address PR comments

Put the non-Backboned assets JavaScript back into its own file.

    update to grid table
    Cleaned up formatting to use `` instead of :code:
    Added Instructor Events and cleaned up outline
    Added instructor events. Cleaned up outline.
    Moved out correct_map table to addendum
    Removed deprecated/undocumented events

Christina/remove user id help

Added missing test in StaticImageBookTest

Focus speed control

updated new post forum dropdown menu for use with chromevox

update discussion forums views to add accessibility information and add hidden accessibilty class to discussion scss, this comprises adding comments count and votes count verbiage and vote call to action

Dhm/asset bug

Disable test that fails intermittently in master

Improve forums nav accessibility

add unicode support for course_wiki

Jkarni/fix/import warnings