Improve pep8 reporting

Update aria label on edX footer

Move common/lib/*.py to openedx/core/lib so that we can import them.

XCOM-147: Change error handling to report back internal errors.

This makes these files importable, and puts them into the new best guess
as to where files should live.

Docstring/messaging cleanup in self-generated certs view.

A11y fixes for EdX header.

Styling for automatic cert generation on Progress page

Jenkins "Quality Report" pep8 output now lists all pep8 violations,
not just the number of violations.

Update translations (autogenerated message)

Allow Instructor To Rename Cohorts And Set Cohort Assignment Method.

Updating edx-search hash to include bugfixes

SOL-217 Adding basic analytics events logging for courseware search - In discussing with @mulby, we agreed to allow this to go in , and we'll add a story to improve the tests at a later time.

Enable/disable cohorts from the instructor dashboard and move cohorts management to its own tab.

Clean up docstrings for gen cert POST.

Update <nav> elements to correctly group links
for screen readers.

Fix RTL display issue with responsive header
on the login/registration page.

Course info page no longer creates enrollments.

TNL-1256

TNL-1258

TNL-1258

course cohort settings only once.

TNL-1258

TNL-1258

TNL-1258

Move `Cohorts` section after `Membership` section

TNL-1268

TNL-181

Fixes merge conflict with account creation transaction.