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.
Translate gender and education level from user profile
Catch exception if for en no default subs is uploaded.
updating commit
Add translator comments for 'other' and 'none' strings
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
Merge pull request #2802 from ionis-education-group/gender-education-translation

Translate gender and education level from user profile
Merge pull request #2796 from edx/alex/no_default_subs_en

Catch exception if for en no default subs is uploaded.
Merge pull request #2517 from ionis-education-group/remove-video-autoplay

Remove autoplay for video in course about page
Reformatted event type info to get it out of wide tables
Merge pull request #2800 from edx/ahodges/documentation/reformatevents

Reformatted event type info to get it out of wide tables
Use display_name_with_default instead of display_name.
Increase max-width for breadcrumb trail.
Improve code clarity.
Merge pull request #2807 from edx/christina/containers

Support xblocks with children on the container page.
Converted 104 existing gif files to png format
Merge pull request #2826 from edx/ahodges/documentation.imageconversion

Converted 104 existing gif files to png format