Refactor out certificate logic from the course listing.

LMS-1477
Add a new status for verified certificates.

LMS-1477
LMS: revises certificate download copy
make edxapp work when not run from a git repo
actually, just remove the revision
Add in a new hook for people who are embargoed in the verified cert track.

LMS-1477
Studio: resolves IE notifications display issue and abstracts CSS to avoid IE selector/rule limit
STUD-815
BLD-457: Fix speed menu when YouTube is unavailable.
Added granular permissions for managing wiki articles
LMS-1355
Merge pull request #1640 from edx/jbau/fix/remove-revision-from-middleware

Jbau/fix/remove revision from middleware
Fixed intermittent issue with course date acceptance test
Merge pull request #1649 from edx/will/fix-course-dates-test

Fixed intermittent issue with course date acceptance test
Added wait for JS before clicking nav menus
Merge pull request #1617 from edx/anton/fix-speed-menu

Video: Fix speed menu when YouTube is unavailable.
Merge pull request #1502 from edx/usman/lms1355-wiki-permissions

Stricter permissions for the wiki
Disabled LaTeX acceptance test
Optimize and cache the query to find the list of groups a user is in
Merge pull request #1654 from edx/will/disable-latex-test

Disabled LaTeX acceptance test
Merge pull request #1650 from edx/will/wait-for-settings-menu

Added wait for JS before clicking nav menus
Merge pull request #1618 from edx/diana/certs-dashboard-update

Certificates Dashboard Updates