Adds the "order" field that was introduced in 0011 to the "models"
dictionary of migrations 0012 and 0013 so South knows that
the field should exist after 0011 is run.
* Remove m2m relation between credit course and credit providers.
* Separate eligibility and provider APIs into different modules.
* Add API call for retrieving a user's eligibilities.
* Cache credit course list.
* Style the dashboard purchase button.
* Display a link for the credit provider on the dashboard.
* Add analytics events for clicks on the purchase button.
* Expose more credit models to Django admin and add search functionality.
* Update credit eligibility when a user satisfies an eligibility requirement.
* Refactor set_credit_requirement_status arguments.
* Use django-simple-history to track requirement status changes.
* Refactor progress page by moving credit into a helper function and adding comments.
* 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).
The CreditRequirement "configuration" field was renamed in Django
code without updating the migration. This commit adds a second
migration to delete the incorrect field and add a new field.
The credit feature is currently disabled in production, so
the model isn't currently used by application code.
