Fix help modal css selector
Moved has_course_access from CMS to student.auth (common)
Change has_course_access definition and doc string

- has_course_access renamed to has_course_author_access for clarity
- Changed doc string to clearly state that it determines whether or not
  a user has write access to a course
Split mongo support for libraries and Library XBlock
Revert "If feature flag is enabled, replace the old login/registration pages with the new combined login/registration page."

This reverts commit f40447b3c8f3946c2edbd21c92fe743e9f54a39d.

Conflicts:
	lms/urls.py

Revert "Add support for external auth on the combined login/registration page"

This reverts commit 988753395fa7509472b99b420057e151ce213399.

Conflicts:
	lms/templates/courseware/mktg_course_about.html
	lms/urls.py
Merge pull request #6123 from mitocw/bdero/move-course-role-check-to-student

Moved has_course_access from CMS to student.auth (common)
Merge pull request #6156 from edx/will/revert-logistration-enablement

Revert enable login/registration
Create helper function to remove duplicate code

This repetitive code is especially pronounced in Stanford's fork, where
we have extended the About page to include several additional fields.

This pays down some technical debt by refactoring into a shared helper.
Merge pull request #5966 from Stanford-Online/kluo/help-modal-id

Fix help modal css selector
fix export for openassessment drafts (PLAT-249)
Merge pull request #5874 from stvstnfrd/up/course/about

Create helper function to remove duplicate code
Merge pull request #6033 from edx-solutions/content-libraries

Modulestore Support for Content libraries (Part of SOL-1, SOL-2, SOL-3)
add disable fixme to pylintrc
Merge pull request #6161 from edx/adam/fix-openended-draft-export

fix export for openassessment drafts (PLAT-249)
Merge pull request #6122 from edx/clytwynec/dont-fail-diff-quality-for-todo

Clytwynec/dont fail diff quality for todo
don't export draft children of orphaned drafted (TNL-923)