Refactor out certificate logic from the course listing.

LMS-1477
Add a new status for verified certificates.

LMS-1477
LMS: revises certificate download copy
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
Added granular permissions for managing wiki articles
LMS-1355
Added wait for JS before clicking nav menus
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
Silence noisy loggers in the devstack
Merge pull request #1657 from edx/will/devstack-logger-silence

Silence noisy loggers in the devstack
more granular transactions in grading [LMS-1480]

remove field_data_cache from grades.grade and grades.progress_summary

cleans grading code by adding wrappers
RESTful refactoring for course_info updates and handouts.

html page and update access use 2 different urls
GET update can get an individual update
STUD-944
Three more A11Y fixes (medium priority ones).

- Make email field in forgot password modal aria-required = true
- Added Transcript skip links to both before and after the transcript
- Add language code to main.html so that screenreaders know what language/region to speak for
Removed old release script
Formalize various access roles as objects

This centralizes the logic for group membership, and means that we
don't need to make queries to find out whether the legacy groups names exist.