"drop", "ondrop", "sendCustomMessage" and "onCustomMessage" added in RTCMultiConnection v1.5

http://www.rtcmulticonnection.org/changes-log/#v1.5

1. http://www.rtcmulticonnection.org/docs/drop/
2. http://www.rtcmulticonnection.org/docs/ondrop/
3. http://www.rtcmulticonnection.org/docs/sendCustomMessage/
4. http://www.rtcmulticonnection.org/docs/onCustomMessage/
getMediaElement.js added.

A library for audio/video media elements' layout.

https://www.webrtc-experiment.com/getMediaElement/

https://github.com/muaz-khan/WebRTC-Experiment/tree/master/getMediaElement