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
Add repsonse pagination to inline discussions
This should enable logging of codejail on prod
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.
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
Change behavior of cohort addition interface

Instead of noting users that are already in a cohort and not changing
such users, clobber the previous cohort and display a message indicating
the previous cohort membership.

JIRA: FOR-452
Explicitly re-save XBlock fields during import
The link to TECH_SUPPORT_EMAIL should have a mailto: protocol !
Merge pull request #3228 from edx/gprice/FOR-542

Change behavior of cohort addition interface
Temporarily disable CAPA problem "Check" button.

- update appropriate jasmine tests so that stubbed $postWithPrefix
respects a subset of jQuery promise API.
- add customization for checking state.
- display checking state while button is disabled.
- ensure checking state lasts for at least a second.
Don't pull unreviewed languages from Transifex
Update translations (autogenerated message)