Merge pull request #2844 from edx/jmclaus/feature_download_transcript_button_with_options

CHANGELOG.rst

cms/static/sass/elements/_xmodules.scss

common/lib/xmodule/xmodule/css/video/accessible_menu.scss

common/lib/xmodule/xmodule/css/video/display.scss

common/lib/xmodule/xmodule/js/fixtures/video_all.html

...odule/xmodule/js/spec/video/video_accessible_menu_spec.js

...xmodule/xmodule/js/src/video/035_video_accessible_menu.js

common/lib/xmodule/xmodule/js/src/video/10_main.js

common/lib/xmodule/xmodule/video_module/video_module.py

common/test/data/uploads/subs_OEoXaMPEzfM.srt.sjson

lms/djangoapps/courseware/features/video.feature

lms/djangoapps/courseware/features/video.py

lms/djangoapps/courseware/tests/test_video_handlers.py

lms/djangoapps/courseware/tests/test_video_mongo.py

lms/templates/video.html