Custom (predefined) user-ids in DataChannel.js — #26 implemented

You can use custom usernames i.e. user-ids:

channel.userid = 'predefined-userid';

// or for auto-initiated data connections
new DataChannel('channel-name', {
userid: 'predefined-userid'
});

DataChannel.js is now compatible to
https://github.com/muaz-khan/WebRTC-Experiment/tree/master/socketio-over-nodejs

Have questions or issues? Submit them here:
https://github.com/muaz-khan/WebRTC-Experiment/issues/26