Ccp0101/capa pythonpath

Allows for additional paths when executing code in a loncapa problem. Adds a default path of data/course/code.

Conflicts:
	lms/templates/footer.html
	lms/templates/signup_modal.html

Add fixes to notes in #182

* use 'location' instead of 'id' in views.
* still need to change names in the coffeescript--quick fix didn't work

Victor/cms more auth

* add optional author_str param to export_to_github
* pass the django user info to that param

* add dummy has_access(user, location) method
* re-organize views by type of access checking needed.

* connect up views from student app
* Add initial @login_required decorators on the protected views
* Add tests for some of the basic functionality

CodeResponse for external/queued grading of student code

Victor/cms auth

Moved static template views to one folder. Removed the stub view functions from student and used static_template_views instead.