Disable parallelization for lms unit tests.

Fix overflowing images in forum posts/responses

modified tests to directly address split test group 0 issues.

Reduce linter thresholds.

Fix course export on edge

Fix email opt in list managemnet command

Removing instances of positive integer tab index values

WL-507: Update the version of Recommender XBlock

updated the version from 2.0.6 to 2.0.7

Merge hotfix-2016-06-10 release into master

TNL-4705

AC-414 adding headings as first child to sections

Hotfix for GET to POST

Repair platform API documentation build

Ensure split-test group zero content is protected

Mocked some Python modules when running a Sphinx documentation publishing build. Updated an autoclass class name that changed."

New XBlock Configuration Models

TNL-4771

TNL-4666

Enable concurrency (but not randomization) in LMS unit tests

AC-473 fixing width of closed captions in fullscreen

Clean up the help tab Sass included on Pattern Library pages

* Initial lms changes for Sailthru

* Fix identified code quality issues

* Fix migration failure

* Fix code quality identified issue

Rename i18n.tests to i18n_tests, so that the i18n.tests package can be a package without squashing the python i18n package namespace

Fix 500 error when searching for a user without catalogs.