pylint

add fixes for 500 bugs (lighthouse 287 and 293) by requiring login for accessing licenses and inline discussions.  Add unit tests for licenses, and rearrange tests based off of (the former) PageLoad.  Also cleanups for pylint and pep8.

add comment on draft store test which explains test success is just for get_items() not to throw an exception when passed in a course_id

* still needs to support uploading a list
* also want to clean up and refactor the code a bit

* add a days_early_for_beta inherited policy option
* students in the beta_testers_{COURSE} group get to see content that many days early
* Clean up some docstrings related to time formats
* Add basic test

fix broken tests from master -> CMS-master merge. Namely the change to unicode strings when reading files off disk. Also there was some work collisions on course_loads which removed Mongo testing. Make it so that explicitly test both XMLFilestores as well as Mongo

- now getting requests from js to server and back, with mocked service.

- look up test courses by id, not name

scss files that were still being partially used by the current
discussion forum.

This reverts commit 010bccc8.

add to existing test cases to exercise the 'course extras as modules' work in the CMS import. Also add to the existing 'full' test data collection to include policy, tabs, etc.