Remove correct/incorrect message, and auto-add in needed markdown for studio
Check to see if a location is valid before displaying it for instructor grading
Merge remote-tracking branch 'origin/master' into fix/vik/studio-oe
Properly increment student attempts
Add test for incrementing student attempts
Fix test
Set default weights
Set a default weight
Merge remote-tracking branch 'origin/master' into fix/vik/studio-oe
add a new django-admin command to dump out a course structure document. This is response to an emergency request from Harvard researchers.
The clean_history management command to remove excess courseware_studentmodulehistory records.
Quiet some debug output, get transactions right.
Add batch and sleep arguments so we can control the speed from the command line.
Records should be sorted by created,id so that timestamp ties will be broken by id.
Use TransactionTestCase, to keep other tests from failing, even though it slows them down.
Only quiet the particular logger we think is too noisy.
Merge remote-tracking branch 'origin/master' into fix/vik/studio-oe

Conflicts:
	common/lib/xmodule/xmodule/combined_open_ended_module.py
Added support for a new problem type: ChoicetextResponse
Updated behavior for split_answer_dict, get_score, and check_student_inputs (responsetypes.py)
Update default handling