Remove autoplay for video in course about page

The iframe was generated with autoplay=1, which, sometimes, would cause
the video to play in the background.
missed rst
further explanation on entry_points
add infinity symbol to calc preview
Fix URLs for static resources
Display only the first component name in the page (and nav) title.
STUD-1351
Translate gender and education level from user profile
Catch exception if for en no default subs is uploaded.
updating commit
Correct misaligned django-cas integration
Merge pull request #2754 from edx/dcs/a11y-shorter-titles

Display only the first component name in the page (and nav) title.
Add translator comments for 'other' and 'none' strings
Make forum comment buttons activate by keyboard

Neither edit nor delete activated on pressing the space key.
making LMS modal buttons more flexible to handle longer strings in translation, eg. French
Merge pull request #2805 from edx/gprice/comment-edit-button-key-activation

Make forum comment buttons activate by keyboard
Merge pull request #2806 from edx/frances/fix/lms-modal-button

making LMS modal buttons more flexible to handle longer strings in trans...
Create coverage reports for bok choy tests in Jenkins
Merge pull request #2809 from edx/zoldak/bok-choy-coverage

Create coverage reports for bok choy tests in Jenkins
Merge pull request #2804 from edx/jarv/update-jsdraw-commit

updating commit
Support xblocks with children on the container page.

STUD-1363