Updated stream settings

- Added more VIDEO_RESOLUTION options
- Fix getUserMedia bugs
- sendStream to allow user to set audio and video options
- joinRoom, sendStream and getUserMedia allows user to "mute" their stream beforehand
- Added more tests for stream settings
- Added "mediaAccessStopped" event
- Added muteStream() function that would only handle muting of streams
- sendStream() to only handle sending of stream always.