Merge branch 'end-breakout-rooms' of https://github.com/ritzalam/bigbluebutton into ritzalam-end-breakout-rooms

Merge branch '2x-client-theme' of https://github.com/riadvice/bigbluebutton into riadvice-2x-client-theme

 - send breakout ended event
 - do not send negative time remaining updates

 - send messages into separate channels so other components can  …

   channels to listen to.

Merge branch 'fix-promote-demote-users' of https://github.com/pedrobmarin/bigbluebutton into pedrobmarin-fix-promote-demote-users

Merge branch 'fix-webcam-fullscreen' of https://github.com/pedrobmarin/bigbluebutton into pedrobmarin-fix-webcam-fullscreen

 - send locale version even if when locale fails to load because it isn't available. The client needs to
   match locale versions from config.xml and the locale itself to make sure the locale strings are correct.
   If the client doesn't receive both version, the client won't continue.

[HTML5 2.0] Add Mute/Unmute methods