Set up the framework for running lettuce tests against studio

Fix iframe conversion problem (111)

add required video setting

make sure we turn off module wrappers for the 'ancillary' course content

be sure to return an instance of the class

Feature/cdodge/cms master merge2

Conflicts:
	.gitmodules
	common/djangoapps/__init__.py
	common/djangoapps/track/migrations/__init__.py
	common/lib/capa/capa/inputtypes.py
	common/lib/capa/capa/responsetypes.py
	common/lib/capa/capa/templates/openendedinput.html
	common/lib/xmodule/xmodule/course_module.py
	common/lib/xmodule/xmodule/video_module.py
	common/static/sass/bourbon/css3/_box-sizing.scss
	doc/development.md
	lms/djangoapps/instructor/tests.py
	lms/envs/aws.py
	lms/envs/common.py
	lms/templates/video.html
	requirements.txt
	test-requirements.txt

Feature/christina/misc

Skip tests that aren't passing. This is a few capa test points, all of sequence, and all video tests.

Feature/cale/cms master merge

Add new tab/window behavior to media kit

media kit - added in new tab/window behavior for download links, revised edX name styling on homepage cta, and provided more context on logo download text

Fix error in one of the media kit assets URLs

Minor style changes to home page and media kit page

[Finishes #41872203]

[#41872203]

Add media kit page

[# 41872203]

Vik/modify open ended

Add splinter to test-requirements.txt