Add Protocol::Role::Nick, kill Protocol::Role::Peers

	modified:   lib/IRC/Server/Pluggable/Protocol.pm
	renamed:    lib/IRC/Server/Pluggable/Protocol/Role/Peers.pm -> lib/IRC/Server/Pluggable/Protocol/Role/Nick.pm
TS-ish nick introduction outline

	modified:   lib/IRC/Server/Pluggable/IRC/Peer.pm
	modified:   lib/IRC/Server/Pluggable/Protocol/Role/Nick.pm