avoid video url rewrite for third party videos

Merge release back to master

INCR-216

* INCR-194

* fixed error, the import absolute_import instruction should have been at the beginning of the file

* added empty line required by PEP 8

* fixed comments order

* trailing whitespace fixed

LEARNER-7210 : Fix search to show courses one time

The course_listing.js view injects courses for search in
ul element containing class courses-listing. Removing this
class from journal and journal bundles will solve the problem

LEARNER-7210

Convert Account Activation Emails to edx-ACE

INCR-176

Initial commit of README for edxnotes.

Readme for the user_api.

Add a readme for the mobile_api.

An initial breakdown of our areas of the monolith.

Initial README for XModule

Initial README for Track app

This reverts commit 5d99714a, reversing
changes made to 5424155c.

Bump to edx-enterprise 1.4.8

Initial README for heartbeat app

INCR-191

Update user_authn README to new format.

Account API: enforce Enterprise policy on backend

INCR-192

INCR-193

Initial README for Discussion

Have a platform-core team that can be responsible for everything that is
not already being owned by a more specific group.

Initial README for Student app

Initial README for the courseware djangoapp.