This change modifies vidforward to accept multiple RTMP URLs in
its control request handler. This allows for the creation of a
revid pipeline for a mac with multiple RTMP outputs.
This change adds functionality for broadcastManager state save.
This is done by marshalling the broadcastManager and saving to a
file. Loading is performed by unmarshalling an re-populating a
broadcastManager value. Testing has been added for this
functionality. Other functionality has been added a side effect.
Saxon Nelson-Milton