Role::Socket method outline, notes wrt filters

	modified:   lib/POEx/ZMQ/Role/Socket.pm
drop some dead-weight, add POE selects

	deleted:    lib/POEx/ZMQ/Role/EmitEvents.pm
	modified:   lib/POEx/ZMQ/Role/Socket.pm
	deleted:    lib/POEx/ZMQ/Util.pm