make the staff debug information appear in a show/hide span

Fast grading

arjun/grading fix

Poor fix for a breaking change in which student answers that were arrays (e.g. those resulting from a checkbox group) would be converted to strings and graded incorrectly.

Fixed incorrect default argument so that tests run; however the new value is incorrect and needs to be fixed.

Don't contact queueing server on Django load

Edit link fix

merging this now because the it looks ok, and it fixes some bugs introduced by the last xserver merge, which are preventing the LMS from running in the current version of master.

Conflicts:
	lms/djangoapps/courseware/module_render.py
	lms/djangoapps/courseware/views.py

Kimth/lms coderesponse

LMS migration