POD updates.

	modified:   Build.PL
	modified:   TODO
	modified:   examples/subscribe_time.pl
	modified:   lib/POEx/ZMQ3/Context.pm
	modified:   lib/POEx/ZMQ3/Publisher.pm
	modified:   lib/POEx/ZMQ3/Replier.pm
	modified:   lib/POEx/ZMQ3/Requestor.pm
	modified:   lib/POEx/ZMQ3/Sockets.pm
	modified:   lib/POEx/ZMQ3/Subscriber.pm
	modified:   t/02_subclass/02_publisher_subscriber.t
	deleted:    xt/01_role/01_zmqsocks_repreq.t