Allow clearing of dates (except for course start date).

it appears we are taking one too many round trips to do when pre-fetchin...

add a test scenario to count RT to database when prefetching children. This uses a shim function on pymongo's collection.find to do the counting

Fix bug #258: multiple choice with choice names ending with 0 cause multiple choice answers marked incorrect

https://edx.lighthouseapp.com/projects/102637/tickets/231

Don't assume input fields will be within a div-- PART 2!

it appears we are taking one too many round trips to do when pre-fetching children. This can be very expensive as the tree gets wider the deeper we go. For example, in courseware we want depth=2 (course, chapter, sequential). But looking at log output we were also getting verticals, which there can be a lot of. This should cut down on the total data we are grabbing from the DB.

Fix incorrect date in test for course xmodule

Matlab Input Type

Don't assume input fields will be within a div.

https://edx.lighthouseapp.com/projects/102637/tickets/232

Upadate link to static documentation.

CSS from JSME doesn't affect surrounding content now

Bug/dhm/date parse

Don't save subsection and unit names until the change event.

Pylint to not require docstring for tests

Conflicts:
	cms/djangoapps/models/settings/course_metadata.py
	cms/urls.py

if we have to reload a module and already have the descriptor, we don't ...

Feature/vaxxxa/docs poll conditional xml