Page skeleton and endpoint to submit FA requests to Zendesk.

ECOM-2824
ECOM-3038

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.

- API built atop Django REST Framework
- Added support for OAuth 2.0 and session authentication
- Added permissions around eligibility data

ECOM-2609

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

These endpoints (`edit_circuit` and `save_circuit`) had already been
commented out of `urls.py`, so these views were disabled.

This reverts commit 783e83de.

ECOM-1017

* removing templates/styling
* removing test logic and URLs

* Add new role for support staff.
* Move dashboard/support functionality into a new Django app called "support".
* Add support view for searching and regenerating certificates.
* Refactor certificates views into separate files.

There's an "explicit" way to configure Django Debug Toolbar that isn't
prone to circular import errors:

http://django-debug-toolbar.readthedocs.org/en/1.0/installation.html#explicit-setup

Do that.

TNL-2487

This reverts commit 85b3bfe4.

XCOM-312

This reverts commit 85b3bfe4.

XCOM-312

This feature flag gates the exposure of the Full course/library
Import/Export API URLs in the LMS. This allows openedX deployments
that operate without Studio to take advantage of the API, while
others may turn the feature off to reserve all content authoring for
Studio.

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.

* Delete reverification templates
* Delete photocapture.js
* Delete unused "name change" end-points
* Rebuild the reverification views using Backbone sub-views
* Stop passing template names to the JavaScript code
* Avoid hard-coding the parent view ID in the webcam view (for getting the capture click sound URL)

* 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).

JIRA: MA-799