This reverts commit 793354a0.

- Add tasks to test lib without coverage
- Add a coverage flag to test.py (set to True, for manual tweaking for now)

http://slacy.com/blog/2012/04/make-your-tests-faster-in-django-1-4/

rake fasttest_lms goes from 48 to 26 seconds.

Now looks for a status_message.json file, looks for 'global' and ${course.id} keys. Return any global message and any course-specific message, joined by <br>.

fab files need to be updated to use this new format (new filename, possibly also help manage per-course messages, or at least test for valid json)

- add a check for the feature flag before trying to save user info to the service

* need to actually return 404 codes to clients when DEBUG=False
* add option to make nose more verbose and drop to pdb on error

* move askbot repo into mitx as a submodule
* set settings as in 85865f7221
* remove test_mongo env.
* Refactor tests to use new config structure.
* Add real integration tests--not working due to bugs in course xml. Turned off.

* new env file to run integration tests with mongo backend
  - needs askbot to get db in the right state
  - needs wiki to load pages successfully
  - not using migrations to make it run faster
* import test courses, check that each page loads without erroring.
* fix NonePointerException in index view to make tests pass
* misc formatting cleanups

* NOTE: successfully running the tests depends on an updated version of
  django-pipeline, which fixes a unicode bug (https://github.com/MITx/django-pipeline/commit/efaba4ac63bc635da6a728603e87e14758541ec7)

Config changes:
* Use separate db for the cms
* Run collectstatic before running tests--needed to get everything in the right place for loading pages
* fix some paths related to this
* Turn off JS compressor for CMS
* add empty test_root/uploads dir

Code changes:
* Add cms tests to check that home page and signup pages load
* Add cms account creation test
* Make github sync tests clean out repo dirs before running.