2. Add site configuration overrides to theming/helpers.py
3. Move microsite.get_value from theming/helpers to site_configuration/helpers
4. Move microsite_configuration.microsite.get_value usages to site_configuration.helpers.values

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

TNL-4692

This reverts commit a796b563.

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

ziafazal: improvements need for multi-tenancy
ziafazal: fixed broken tests
ziafazal: no need to add setting in test.py
ziafazal: added hostname validation
ziafazal: changes after feedback from mattdrayer
ziafazal: fixed branding and microsite broken tests
ziafazal: make STATICFILES_DIRS to list
ziafazal: added theme directory to mako lookup for tests
ziafazal: added more protection in test_util
saleem-latif: Enable SCSS Overrides for Comprehensive Theming
saleem-latif: Incoporate feedback changes, Correct test failures, add tests and enable theming for django templates
saleem-latif: Correct errors in python tests
mattdrayer: Fix invalid release reference
mattdrayer: Update django-wiki reference to latest release
saleem-latif: Update Theme storages to work with Caching, Pipeline and collectstatic
saleem-latif: Incorporate feedback changes
mattdrayer: Pylint violation fix
mattdrayer: Fix broken pavelib test

This reverts commit 954dae58.

ziafazal: improvements need for multi-tenancy
ziafazal: fixed broken tests
ziafazal: no need to add setting in test.py
ziafazal: added hostname validation
ziafazal: changes after feedback from mattdrayer
ziafazal: fixed branding and microsite broken tests
ziafazal: make STATICFILES_DIRS to list
ziafazal: added theme directory to mako lookup for tests
ziafazal: added more protection in test_util
saleem-latif: Enable SCSS Overrides for Comprehensive Theming
saleem-latif: Incoporate feedback changes, Correct test failures, add tests and enable theming for django templates
saleem-latif: Correct errors in python tests
mattdrayer: Fix invalid release reference
mattdrayer: Update django-wiki reference to latest release

CCX REST APIs
OAUTH2 authorization for CCX APIs
- oauth2 authorization required for ccx list.
- Course-instructor permission for ccx api endpoint
- Protection for detail view too.

Tests for CCX REST APIs and OAUTH2 authorization

* mattdrayer: Updated get_themed_template_path

This reverts commit 8402be3b.

Ran these suckers through ImageOptim, which crunched 'em down real nice.

 lms/static/images/wmd-buttons-transparent.png       | Bin 9698 -> 7046 bytes
 lms/static/images/wmd-buttons.png                   | Bin 7465 -> 5970 bytes
 .../credit_notifications/edx-logo-header.png        | Bin 1894 -> 1225 bytes
 .../ebe754f90bc88acf8ec6a1d27b87f743_120.jpg        | Bin 3168 -> 2752 bytes
 .../ebe754f90bc88acf8ec6a1d27b87f743_30.jpg         | Bin 957 -> 648 bytes
 .../ebe754f90bc88acf8ec6a1d27b87f743_50.jpg         | Bin 1362 -> 1048 bytes
 .../ebe754f90bc88acf8ec6a1d27b87f743_500.jpg        | Bin 15852 -> 13940 bytes
 .../f0d065035a5c4d32df318fbc54138765_120.jpg        | Bin 3168 -> 2752 bytes
 .../f0d065035a5c4d32df318fbc54138765_30.jpg         | Bin 957 -> 648 bytes
 .../f0d065035a5c4d32df318fbc54138765_50.jpg         | Bin 1362 -> 1048 bytes
 .../f0d065035a5c4d32df318fbc54138765_500.jpg        | Bin 15852 -> 13940 bytes
 themes/edge.edx.org/lms/static/images/logo.png      | Bin 7465 -> 4574 bytes
 themes/edx.org/cms/static/images/studio-logo.png    | Bin 4782 -> 4779 bytes
 themes/edx.org/lms/static/images/logo-large.png     | Bin 4581 -> 3367 bytes
 themes/edx.org/lms/static/images/logo.png           | Bin 1244 -> 1184 bytes
 .../lms/static/images/profiles/default_120.png      | Bin 6398 -> 3252 bytes
 .../lms/static/images/profiles/default_30.png       | Bin 993 -> 522 bytes
 .../lms/static/images/profiles/default_50.png       | Bin 2068 -> 1035 bytes
 .../lms/static/images/profiles/default_500.png      | Bin 91560 -> 0 bytes
 themes/red-theme/lms/static/images/logo.png         | Bin 909 -> 559 bytes
 20 files changed, 0 insertions(+), 0 deletions(-)

- Remove escaping in display_name_with_default
- Move escaped version to deprecated display_name_with_default_escaped
- Does not include any other changes to remove double-escaping

Thanks to agaylard who initiated this work:
https://github.com/edx/edx-platform/pull/10756

TNL-3425

This is a squash of 38 commits ending with
5b080f979d692804452400ac5bed9b17c50b001e