Updated lti.properties file
 - notify JS API that user has left the meeting
Merge branch 'master' of github.com:bigbluebutton/bigbluebutton
 - make video windows the same sizes inside video dock
fix hide and show presenter icon in videoconf
 - don't display video control buttons when window is very small
Updated image for 081 landing page
Merge branch 'master' of github.com:bigbluebutton/bigbluebutton
fix for webcam sharing
Merge branch 'master' of https://github.com/bigbluebutton/bigbluebutton
put a check while the activation is complete for publishing
initial changes for third party page
Merge branch 'master' into presentation-js-api
Fixed the ghost audio by pausing after duplication
Merge pull request #141 from SenecaCDOT-BigBlueButton/fix-duplicate-audio

Fixed the ghost audio by pausing after duplication
listen js conversion events
Merge branch 'presentation-js-api' of https://github.com/bigbluebutton/bigbluebutton into presentation-js-api
The audio settings window had two help buttons which did the same thing. Removed one of them.
Added accessibilityDescription to audio settings help button and a corresponding string in English locale
Added accessibilityDescriptions to buttons in Audio Settings window.