Update the spec to include ServerInfoRetrieved and RetrievedServerInfo
Update the spec to include ServerInfoRetrieved and RetrievedServerInfo

This also removes STUNServersAdded and RelayInfoAdded.

Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble