Implement RTCDataChannelEvent as per RTCIceCandidateEvent
Update bridge example to use event format
Create a new RTCDataChannelMessageEvent prototype to match the browser onmessage event signature
Update bridge example to use new event signature
Merge pull request #70 from DamonOehlman/datachannelevent

Implement RTCDataChannelEvent
Merge pull request #71 from DamonOehlman/datachannelmessageevent

Implement RTCDataChannelMessageEvent
Merge branch 'develop' into dc-comms
Should have been implemented as a data member not message
Merge branch 'fix-datachannelmessageevent' into dc-comms
Changed to send binary data rather than text