Adds a context-sensitive link to learner documentation from the LMS. The base URL defaults to Open edX learner doc and can be overridden with the base URL for edx.org learner doc.  Also relabels the tab for support from help to support.

TNL-4670

These changes unify four different approaches to JWT creation, moving the core of the AccessTokenView to a general-purpose JwtBuilder class. This utility class defaults to using the system's JWT configuration, but it will allow overriding of the signing key and audience claim to support those clients which still require this. Part of ECOM-4566.

Refactor all S3 code to use the django storage API and add swift
settings for openstack deployments

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

This commit "undoes"a previous hotfix, and allows a cms course_publish
signal to trigger a block_structure update_course_in_cache task, which
is run on an lms worker queue.

Changes:
    -exposes ALTERNATE_QUEUE_ENVS
    -adds routing layer in celery.py
    -moves prior dev_with_worker settings file to devstack_with_worker
    -moves course_block api functionality into openedx/core/djangoapps/content/block_structure

ECOM-4325

This reverts commit a796b563.

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

We use S3 for a number of uploads. Boto, by default, includes a auth querystring on the returned URLs. Since these uploads are public, there is no need for this querystring. Additionally, the long length URLs cause problems when API consumers need to store the URLs. This commit resolves this problem by removing the auth querystring.

- Updated to latest versions of boto and django-storages-redux packages
- Added AWS_QUERYSTRING_AUTH setting to remove the querystring values

ECOM-4081

We use S3 for a number of uploads. Boto, by default, includes a auth querystring on the returned URLs. Since these uploads are public, there is no need for this querystring. Additionally, the long length URLs cause problems when API consumers need to store the URLs. This commit resolves this problem by removing the auth querystring.

- Updated to latest versions of boto and django-storages-redux packages
- Added AWS_QUERYSTRING_AUTH setting to remove the querystring values

ECOM-4081

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

Resolves an issue preventing students in self-paced courses from seeing all available discussion modules. ECOM-3733.

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

There is one DB where we do not want it specified since transactions
on the CSMHE table when we aren't atomic across databases isn't a win.

Enable the changes to the ELASTIC_SEARCH_CONFIG setting to be read from cms.env.json or yaml as it is for the lms.

ECOM-3384

 The CCXCon app is used to push course updated to the CCXCon
 externale service.

Adding the declaration of the settings object to openedx.conf to be able to import it from a nicer location

Resolving quality violations

Merging dicts with the settings definition when they exist in the microsite configuration

Using a cache to improve the perfomance of quering any dictionary in the microsite definition

Ignoring the invalid-name pylint warning since the names must be kept thsi way to stay the same as the ones in django.
Removing the default dict argument as per https://docs.python.org/2/tutorial/controlflow.html#default-argument-values

Extracting the implementation of the microsite to a selectable backend.

Leaving the function startup.enable_microsites for backwards compatibilityy

Adding a database backend

Using a cache to improve the perfomance of quering any dictionary in the microsite definition.
Changed the database backend so that it extends the settings file backend and removed all the unnecessary methods.

Using the backend provider for the get_dict function

some tweeks and some initial unit tests

Using getattr as a function insteal of calling the underlying __getattr__ directly

Adding an ModelAdmin object for the microsite model in the django-admin panel

refactor enable_microsites()

consolidate/refactor some shared code

add config to aws.py and add migration files

fix tests

Changes to get the backends to run after the refactor

add archiving capabilities to microsites. Also make a few notes about performance improvements to make

fix tests

Making the query to find if microsites exist in the database faster

add ORG to microsite mapping tables and some performance improvements

allow for Mako templates to be pulled from the database

fix tests

For the database template backend the uri of the template does not use the filesystem relative path

Fixing pylint violations

Added caching of the templates stored in the database

Fixing pylint errors

fix pylint

Clearing the cache on model save

Fixing pylint errors

rebased and added test coverage

rebased cdodge/microsite-improvements branch with master and added test
coverage

added missing migration

fix quality violations

add more test coverage

mattdrayer: Add microsite_configuration to cms.INSTALLED_APPS

added microsite settings to cms/envs/test.py

run session cookie tests only in LMS

fixed broken tests

putting middleware changes back

Preventing the template_backend to be called on requests which have no microsite

changes to address feedback from mjfrey

changed BaseMicrositeBackend to AbstractBaseMicrositeBackend

changes after feedback from mattdrayer

fixed broken tests and quality violations

Allowing the backend to handle the enable_pre_startup routine

Typos and docstrings

Adressing feedback

Fixing python tests

add comment to explain why we need enable_microsites_pre_startup()

Extends the Programs ConfigurationModel, cleans up Programs-related utilities and corresponding tests, and corrects caching. Uses the Programs API to list programs within Studio. ECOM-2769.

Please note that this is a squshed commit and the work of:
Symbolist, macdiesel, nedbat, doctoryes, muzaffaryousaf and muhammad-ammar

This reverts commit 2bfbda3c.