Add flash video onebox support
http://meta.discourse.org/t/will-there-be-flash-videos-in-the-future/7787
Update migrations to be compatible with Rails 4
Add custom headers for email messages

See http://meta.discourse.org/t/custom-headers-in-emails-site-settings/7480
Log all changes of user trust level by an admin
If the change doesn't go through, don't log anything
Add flash video onebox as disabled setting by default
Added `In-Reply-To` and `References` email headers. Additionally removed username from
email replies and new posts to keep the subjects collapsable.
FIX: OpenGraph should feature the desired post, if found in the set.
Refactor code that raises deprecating warnings in Rails 4
Add blocked users count to dashboard
More nav links on admin users list page
Add tooltip to avatars of people who liked a post
Update category's topic_count immediately when trashing or recovering a topic; this ensures that a category can be deleted without waiting for the category_stats job to run.
upgrade font awesome to version 3.2.1, use scss instead of css for the include.
wrapped I18n.lookup to inject the "js" namespace
removed unnecessary console.log
fool jshint
Mobile and tablet video rendering fix
http://meta.discourse.org/t/chrome-for-ipad-iphone-breaks-with-this-video-embed/7983
added EMBED_CLOCKWORK so users can embed clockwork scheduling inside another process
improve best of copy slightly