This is a public, versioned, RESTful API for importing and
exporting full course content. The code was initially ripped from the
existing import/export API in the CMS contentstore djangoapp and wrapped
in Django Rest Framework view classes. It's a new djangoapp in
the openedx directory which is largely an abstraction off the CMS
Import/Export views.

This PR includes configuration changes. Most notably, Studio is
configured to serve the OAuth2 provider alongside the LMS.

This is the initial thread on the code list:
https://groups.google.com/forum/#!msg/edx-code/DmnHWmly25A/ZqjD1zb4o7oJ

And this thread contains another description of the changes:
https://groups.google.com/d/msg/edx-code/6dP9SEKsmqQ/Pvyn8fBDx68J

There are a numerous non-covered lines, all of which are missing
coverage in the CMS API this was ported from. They're mostly error
conditions, such as handling of multipart file upload errors.

Currently, Python implicitly concatenates two string entries located next to
each other because there is no comma separating them.  The code concatenates
"*.pyc" and "sass/*.scss", creating a single entry called "*.pycsass/*.scss".

Display warning message on course outline in Studio when course contains deprecated features/components

TNL-2303

* Add a new cookie for user information
* Make marketing cookie names configurable.
* Handle URL reversal when URLs don't exist (in Studio)
* Move cookie code from student/helpers.py into its own module.

This reverts commit 09425c3d, reversing
changes made to 410b9282.

ECOM-1523

TNL-2384

Refactored Studio's PagingView to use RequireJS Text and moved it
to common so that it can also be used by LMS.

ECOM-1591

* Add end-point for initiating a request for credit from a provider.
* Add an end-point for a provider to update the status of a request (approved / denied).

Also reconfigured paver to compile Sass into CSS directories

* Add Python API functions for creating and updating requests for credit.
* Add Django models and migrations for tracking credit requests and status.

- SOL-465: Initial implementation of certificates web view and signatories (names/titles)

- SOL-718 Close button is working properly

- SOL-801 Backbone Signatories Modeling

- SOL-803 Underscore template: Editor (Add)

- SOL-802 Signatories: Underscore template - Details

- SOL-804 Signatories: Underscore template: Editor (Edit)

- Add signatory delete Django view

- SOL-805 Signatory editor (Delete)

- Add Coffeescript router

- SOL-716 Jasmine Tests

- Added missing minified JS library

- client side validation of signatory fields

- SOL-390 signatories names

- Remove obsolete extends Sass files

- input maxlength limiting for signatory information

- SOL-389: Course title override

- SOL-466: Add capability to upload digitized signatures in Studio

- ziafazal: fixed css for upload signature image

- ziafazal: completed deletion of signature images

- UX-1741: Add initial static rendering/styling for Open edX web certs
  * creating new global static dir
  * adding static version of edX UX pattern library assets
  * adding web certificates static assets
  * adding static (+abstracted) web certificates rendering
  * creating two tiers of rendering (base + distinguished)
  * providing sample assets for certificate rendering
  * supporting RTL layouts
  * adding certifcates assests to edX static asset pipeline
  * temporarily hiding the mozilla open badges share action
  * wiring print button to print view/page
  * fixup! addressing conflict artifact in valid cert template
  * fixup! adding missing %hd-subsection sass extend + components comment clean up
  * fixup! correcting pattern library .hd-4 font-weight value

- SOL-468 Linked Student View for Web View Credential

- SOL-467: Add capability to upload organization logos for certificates

- SOL-391 / SOL-387: Signatory related info (assets) in certificates web view

- kelketek: Fixes for static asset collection in certificate HTML view.

- SOL-398 Web View: Public Access

- mattdrayer: Post-merge branch stabilization

- catong: Initial changes to Studio template and Help config file

- ziafazal: Branch stabilizations

- SOL-387: Display organization logo on LMS web view

- talbs/mattdrayer: Branch Stabilizations

- talbs: converting backpack action to use a button HTML element

- talbs: revising placeholder assets + their rendering in cert view

- mattdrayer: Username web view wireup

- SOL-386 Certificate Mode Previews

- SOL-905: Make organization logo and signatory signature uneditable

- SOL-922: Improve test coverage

- SOL-765: Add LinkedIn sharing

- [marco] temporary styling adjustment to account for smaller linkedin share image / fake button

- SOL-921: Address hardcoded template items

- SOL-927: Deleting certificate should delete org logo image also
  * updated invalid template
  * removed hr
  * fix invalid certificate error

- clrux: Add i18n to certificate templates and partials

- mattdrayer: Pylint violations

- SOL-920 Certificate Activation/Deactivation

- mattdrayer: Added LMS support

- SOL-932: Fix preview mode support in certificate view

- SOL-934: Fixed bug reported and broken tests

- SOL-935 removed the 'valid' word from web view title

- talbs: RTL support updates/fixes
  * revising certificate type icon/name vertical alignment
  * removing unused older certificate template
  * revising styling for message/banner actions
  * abstracting accomplishment type to use course mode + adding in honor/verified-specific placeholders

- mattdrayer: JSHint violations

Filter by Language:
Designation for course language(s) in Studio
allows for filtering of courses based on their language in the sidebar
Reuses active filter view UI/IA from find courses page on edx.org
view for clearing individual or all filters, as with edx.org filtering

Fix n-click behaviour on poster.
Fix unit tests.
Fix handler for non_en lang for bumper.
Add more tests.
Fix docstrings.
Fix pep8.
Fix static redirection with bumper.
Fix button in IE11.
Add video_bumper field in bok_choy.

Fix pylink violations.

Update docstrings and some clean up.

Rename edx_video_id in bumper tests.

Fix too long lines in help text.

Address ui comments.

Fix bumper events.

Refactor bumper-transcripts code, fix bugs, address comments.
Squashed commits:
Fix download transcript button.
[74e0c8c] Fix quality
[a759f33] Fix error, when sub contains extension.
[b30755c] Revert "Add video files to host for transcripts."

This reverts commit cf8a96bf84346e17b6ad57ad4cc6a27d7a9118cd.
[36f038a] Add video files to host for transcripts.
[23f1655] Fix pep8 and pyling issues.
[0f1f9d2] Update acceptance test.
[765a27d] Wait for ajax in captions.
[8ae72a3] Fix logic.
[063450f] Fix unit tests.
[d1075fc] Fix handlers tests.
[25d31ad] Update bumper_utils.
[cb5f9df] Remove maxDiff.
[8738b1a] Code cleanup.
[87dbcb7] Fix issues with transcripts.
[ec899de] Fix transcripts in serializers.
[444b1fc] Fix transcripts typo.
[d524cb5] Fix bumper.
[f62cf22] Fix video mongo tests.
[8f1b55a] Fix dispatches.
[53bc308] Add more fixes.
[d5e3723] Fix test_video_handlers and rename the method.
[93efc23] Fix mobile tests.
[740e2ae] Fix pep8 and pylint.
[47cfb66] Address comments, add fixes.
[4e499d9] Add fixes.
[8353553] Add improvements.

Updated dispatch values)
.

Use ddt in bumper handler tests.

Move common metadata to single place.

Fix style.

Update docstring.

Fix poster button.

Improve bumper events.

Fix test after rebase.

Address comments.

Download transcript: use def video lang, not bump.

Renamed date_last_view_bumper to bumper_last_view_date.

Rename do_not_show_again_bumper to bumper_...

Address comments.

Fix tests for download for en lang.

Fix bumper logic.

Update strings.

Update resizer.

Remove resizer.

Fix unit tests.

Add tests.

Fix bumper events.

Clean up tests.

Fix pylint violations.

Fix pep8 and pylint violations.

Update docs and method names.

Update events.

Make /static/ prefix a must.

Fix wrong code.

Use native checkboxes for courseware license options
In Studio settings editor for video module, don't show license if feature-flagged off
Don't let Scope.contents fields leak to Studio editor
JS gettext() must all be on the same line for i18n
Add docstrings for bok-choy tests
Remove LicenseMixin from HTMLDescriptor
Responding to UX review feedback
Add aria-pressed attribute
Use https links instead of protocol-relative links for links to creativecommons.org
Remove license from course outline page in Studio

This allows course authors to choose between two difference licenses for their
course content: All Rights Reserved, or Creative Commons. In the backend, XBlocks
that wish to allow custom licenses need only inherit from LicenseMixin, which
adds a `license` field as a string.

License information is displayed in the Studio editor view, and just below the
rendered XBlock in the LMS. In addition, if the course block itself has a custom
license set, this license will display just below the main body of the page
on courseware pages.

This entire feature is gated behind the LICENSING feature flag.

TNL-1789

TNL-1796

TNL-1606

TNL-1545

Added setting to enable/disable library indexing + moved is_index_enabled into search indexer classes
Added task and signal to fire library reindex

- sharing enabled for custom URLs only if URL actually specified

This makes these files importable, and puts them into the new best guess
as to where files should live.