window.RTCPeerConnection is non-functional in firefox, use mozRTCPeerConnection and RTCPeerConnection as fallback;  added comment/license for chrome sdp hack for bandwidth
window.RTCPeerConnection is non-functional in firefox, use mozRTCPeerConnection and RTCPeerConnection as fallback;  added comment/license for chrome sdp hack for bandwidth

clehner/SimpleWebRTC,mvayngrib/SimpleWebRTC