This reverts commit acf50c44.

This reverts commit ed80381b, reversing
changes made to 205cb8b3.

2. Update COMPREHNSIVE_THEME_DIR to COMPREHENSIVE_THEME_DIRS
3. Update paver commands to support multi theme dirs
4. Updating template loaders
5. Add ENABLE_COMPREHENSIVE_THEMING flag to enable or disable theming via settings
6. Update tests
7. Add backward compatibility for COMPREHEHNSIVE_THEME_DIR

- Handle case when no files are linted
- Skip deleted files for safe commit script
- Add verbose options for safe commit

This will be a backwards-compatible change, which will allow
developers that use older versions of firefox (e.g., 28) to
continue with development while also supporting a build system
and development that uses newer firefox versions (e.g., 42)

- Add rule based thresholds
- Add safecommit to Jenkins

edxapp-migrate-lms figures out at system build time what databases
it needs to migrate (just default, or default + student_module_history).
This avoids paver needing to be clever about figuring out if a user has
enabled the split CSMHE databases flag and permits this to merge early
and safely.

We can turn the CSMHE flag on from configuration at the same time we
enable all of the database config and ensure that the new database is
created.  Until a devstack is provisioned using that version of
configuration, it'll continue to have 1 DB and migrate 1 DB.  This
allows us to better control deployment.

edxapp-migrate-lms figures out at system build time what databases
it needs to migrate (just default, or default + student_module_history).
This avoids paver needing to be clever about figuring out if a user has
enabled the split CSMHE databases flag and permits this to merge early
and safely.

We can turn the CSMHE flag on from configuration at the same time we
enable all of the database config and ensure that the new database is
created.  Until a devstack is provisioned using that version of
configuration, it'll continue to have 1 DB and migrate 1 DB.  This
allows us to better control deployment.

TNL-4102

Resolves conflicts between reverts of pattern library test pages and multi-site comprehensive theming, and the re-introduction of pattern library test pages. Fixes a pipeline rendering test which relied on other tests updating assets. The test now ensures that static assets are available before running.

This reverts commit a796b563.

Conflicts:
	lms/envs/common.py
	openedx/core/djangoapps/theming/models.py
	pavelib/assets.py
	pavelib/paver_tests/test_assets.py

FEDX-93

These are developer only pages, so can not be seen in production
environment. On devstack, you can access these pages in LMS and
Studio at:

    /template/ux/reference/pattern-library-test.html

This is the second attempt to enable the Pattern Library. The
first attempt broke Django Templates and didn't work correctly
with right-to-left styling.

This reverts commit 845e3708.

This reverts commit 845e3708.

FEDX-93

These are developer only pages, so can not be seen in production
environment. On devstack, you can access these pages in LMS and
Studio at:

    /template/ux/reference/pattern-library-test.html