Separate cms and lms auth and env files, and have the LMS that runs with the CMS use the CMS modulestore

* add course and org to full/course.xml
* fix error path in clean_xml script
* commit rakefile change needed by c5334f150c

* 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

* We do not want to disable existing loggers when setting up our own

Eagerly load all modules when reading the course from xml, so that users who are already on a problem page can check their answers

Move vendor javascript into common/static/js/vendor, so that they can be shared between the CMS and LMS, and create an html template that includes all of the vendor js needed for the courseware

* Note: This doesn't run yet
* add config file for lms on mongo
* Some comment additions and cleanups

Uniquify js fragments pulled from XModules, and load both XModuleDescriptor and XModule js into the cms

Removed a bunch of non-necessary javascript from homepage. Most of it was put back in courseware. A new PIPELINE_JS group 'courseware' was created, for pipeline javascript files that should only be in the courseware.