While show_homepage_promo_video would previously toggle the control to
play the welcome video on and off, the YouTube embed iframe would be
included in index.html unconditionally. This created the ugly
situation that YouTube would try to pull in a non-existent video, and
that a DoubleClick tracking beacon would be introduced to the start
page for no reason.

Instead, make sure show_homepage_promo_video toggles the entire modal
video section on and off, suppressing it altogether unless
show_homepage_promo_video is set.

adding sstudent to AUTHORS

Remove ThemingAware storage mixins and ComprehensiveThemeFinder

Add the ability to exclude files from URL canonicalization.

Fix the help text for cert_name_short and cert_name_long

fix typo on certificate page

XBlockAsides: little example of usage

Correct flaky condition on tooltip.

Edited wording of UI labels for configuring subsection prerequisites …

To be able to more easily deal with same-origin issues, due to some course assets being loaded in an iframe, we're adding the ability to specify file extensions that should be excluded from URL canonicalization.  The default value is simply 'html', which means we won't rewrite asset links that point to files ending in .html.  Thus, they'll be loaded from the same origin as the parent page, and voila, no SOP issues.

Complete static i18n PR

This resolves the textual issue in [ECOM-2907] (https://openedx.atlassian.net/browse/ECOM-2907).
There will also be a data fix.

Add Kaloian Doganov to AUTHORS

Automatically find a better email for a committer than x@users.noreply.github.com

PHX-246 Multiple problems in a prerequisite sequence causes grading to fail

Remove gating api import from course xmodule

HOL-44 / Added check for duplication of email

[firefox upgrade] Wait for code mirror editor to be active

Not an issue for our tests on firefox 28; however, once we upgrade to
Firefox 42 (or later), a new wait condition is needed here. Otherwise,
the content is not set because selenium's action chain is starting too
early.

Remove gating api import from course xmodule to avoid importing django related code into non-django related code

Speed up Sass compilation with libsass

Updating edx-milestones dependency to fix edx-opaque-keys install

PHX-219 Subsection Gating

add edx-organizations api urls in lms