Merge pull request #2548 from edx/diana/drupal-registration-i18n

Don't internationalize strings we use for enrollment.
BLD-824: Download Video link missing from video player.
Merge pull request #2554 from edx/anton/fix-video-import

Video: Fix for Download Video link.
First draft 2-12-14 release notes
Clean up of modulestore references (primarly LMS).

STUD-1151
Add gene editor; update protein builder and molecule editor
BLD-811: Revert functionality.
Merge pull request #2557 from edx/anton/revert-download-transcript-rc

Video: Revert Download transcript button behavior.
failing test for xblock_handler
STUD-1311
Add Catalan (Valencia)
Fix STUD-1311 (Don't overwrite published content w/ draft content accidentally)
Merge pull request #2573 from cpennington/zub/bugfix/std1311-changestodraft

Fix for STUD-1311
Merge pull request #2572 from edx/sarina/add-catalan

Add Catalan (Valencia)
Enable XBlocks in bok_choy tests
Removed css issue per Dave
Documentation for Image Modal tool
Merge pull request #2519 from edx/markhoeber/documentation/stud-1258

First draft of documentation for Image Modal tool
Store locations in ReferenceLists so they can be converted to locators.

STUD-1027
Update info about gene explorer, molecule editor, and protein builder
Add new Gene Explorer screen shot