Per-channel Profile

This release provides the functionality to be able to specify the profile to be used on a per-channel basis. Defines how the master manifest for each channel is generated.

The api to provide this is in the channel definition provided by the Channel Manager implementation:

class RefChannelManager {
  getChannels() {
    return [ { id: '1', profile: [ bw: 6134000, codecs: 'avc1.4d001f,mp4a.40.2', resolution: [ 1024, 458 ] ] } ];
  }
}