- try to switch webcam stream when switching presenter
 - dispatch switch layout event when moderator locks the layout and switch
 - provide api to query user info
 - remove BigBlueButton text
 - fix problem where JS API isn't called when user becomes viewer
 - style mic settings and file upload windows
Merge branch 'master' into update-webcam-when-switching-presenter
 - call js interface when link is clicked on chat
Merge branch 'master' of github.com:bigbluebutton/bigbluebutton