Playing with socket cleanup order.

Still running into 'bad FD' . . .

	modified:   lib/POEx/ZMQ3.pm
	modified:   lib/POEx/ZMQ3/Role/Sockets.pm
Whoops -- commit t/

	new file:   t/00_utils/01_context.t
	new file:   t/02_class/01_requestor_replier.t
	new file:   t/02_class/02_publisher_subscriber.t