All the examples need to be updated, SDP should only be
emitted after gathering is done (until we support trickle)
Currently we can't be controlling-ICE, but that is probably a days
worth of work. After that is done pion-WebRTC should be able to talk
to itself.
Candidates are now generated with real priority, and actually pay
attention to the inbound messages.
Next we just need to pluck use-candidate + ice-controlling from the
messages and we will have a full-ice implementation (but we are not
controlling)
We then need to add timers to alert when the peer goes away OR when we
need to send again.
