Changed bootstrap, check for perromance not needed with new apprtc shim.
Merge pull request #3 from stefhak/master

Changed bootstrap, check for perfomance support not needed with new apprtc shim.
Added a "doorhanger" that let's the user accept/reject use of camera and microphone.
More robust function (for the bar/doorhanger + accept/reject use of cam/mic).
Made it work properly with apprtc.appspot.com.
Rebased to create a new PR. Also, added file headers.