Pre-recorded media streaming

Streaming pre-recorded video (media file)

Currently, using Firebase for streaming chunks of data because
MediaSource APIs are only supported on chrome canary which has
unreliable RTP (RTCDataChannel) streams.

Streaming WebM files only (in the moment!)

WebM file's size must be less than 1000KB; otherwise it will fail. It is
a bug will be fixed soon.

Demo:
https://googledrive.com/host/0B6GWd_dUUTT8RzVSRVU2MlIxcm8/Pre-recorded-Media-Streaming/

Source code:
https://github.com/muaz-khan/WebRTC-Experiment/tree/master/Pre-recorded-Media-Streaming