Initial commit
mattdrayer/master: Initial solution framework
mattdrayer/master: Aligned solution skeleton with Open edX conventions
mattdrayer/master: Added signal receivers, manager, models
mattdrayer/master: Added comments and a bit more impl
mattdrayer/master: Additional comments
mattdrayer/master: Wired-up initial unit test to signal, receiver, and api.
mattdrayer/master:  Added platform signals reference
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
mattdrayer/master: Better mocking, new workflow
mattdrayer/master: Added workflow broadcasts and test coverage
mattdrayer/master:  Added prerequisite course removal workflow
mattdrayer/master: Fixed south integration and migration file