* course roots live in roots/{url_name}.xml
- one is linked from course.xml
* policies live in policies/url_name.json
- loaded based on course url_name
* Updated to pass policy through into xml parsing, so it takes effect
before descriptor constructors are called.
* Update toy test course to new structure, fix up tests
* More tests for mongo modulestore, including tweaks to test files
* add location_to_id method to CourseDescriptors
* Implement path_to_location method in mongo.py
- TODO: does not handle position in sequences yet.
* fix bug in jump_to view.
* Clean up test data for simple, toy courses
* clean up test_mongo.py
* write initial test for path_to_location
* hook up view to use path_to_location
Next: actually implement it :)
