extend loading screen until all participants are loaded
Merge pull request #14 from SenecaCDOT-BigBlueButton/extend-loading-screen

extend loading screen until all participants are loaded
unsubscribe from event listeners once evens are been triggered
unsubscribe from all event listeners once evens are been triggered
Merge pull request #15 from SenecaCDOT-BigBlueButton/extend-loading-screen

unsubscribe from event listeners once evens are been triggered