make embargo template theme-able

Use "Stanford-style" theming to enable you to put your own embargo
notice up.
missing themed embargo page fails safely to unthemed
updated pdf viewer
Convert CAPA inputtype statuses from strings to objects, in order to
simplify css class management and internationalization of status strings
(potentially) displayed to the user.
Add repsonse pagination to inline discussions
This should enable logging of codejail on prod
Fix the pointer to the contentstore in the bok-choy settings
Add SHOW_PROGRESS_SUCCESS_BUTTON feature

Show a button at the top of lms/templates/courseware/progress.html if the
lowest nonzero grade cutoff has been reached. Introduce two settings:
PROGRESS_SUCCESS_BUTTON_URL is the href of that button (the course id is
appended); PROGRESS_SUCCESS_BUTTON_TEXT is the text, defaults to
"Download your certificate"
Make the SHOW_PROGRESS_SUCCESS_BUTTON feature more flexible

The button text default is now in the template and i18n-able, a
PROGRESS_SUCCESS_BUTTON_TEXT_OVERRIDE option is offered in settings.
The button url now uses string formatting.
Move overview drag and drop code to a utility class.
Merge pull request #3218 from edx/zoldak/bok-choy-contentstore

Fix the pointer to the contentstore in the bok-choy settings
Merge pull request #3208 from edx/christina/container-reorder

Move overview drag and drop code to a utility class.
Change user.is_authenticated to user.is_authenticated() in roles.py.
LMS-2442
Merge pull request #3065 from edx/waheed/lms2442-fix-is_authenticated-in-roles

Change user.is_authenticated to user.is_authenticated() in roles.py.
Updating the ORA2 hash for release week 2014-04-07
BLD-970: Fix flaky test.
Merge pull request #2986 from edx/dcs/a11y-pdfreader

Accessible PDF textbook viewer
Merge pull request #3215 from edx/anton/fix-test-video-position

Video: Fix flaky test.
Merge pull request #3233 from edx/sanchez/update-ora2

Updating the ORA2 hash for release week 2014-04-07
Updating the release with a tagged hash