cleaned up some voice connection properties
modified voiceconnection so it is reused
Merge pull request #12 from bigbluebutton/add-join-voice-button

Clean up VoiceConnection so that it can be reused after hanging up the call
Adding camera quality selection
removing resolution values from locals and fixing bug to set the medium quality when camera starts for the first time
Merge pull request #16 from SenecaCDOT-BigBlueButton/improve-camera-quality

Adding camera quality selection