Add initial implementation of wf:eager/defer

Conflicts:

	include/wf.hrl
	src/actions/action_wire.erl
	src/lib/wf_render_actions.erl
	src/lib/wf_render_elements.erl
Add gproc registry handler from n2o (Thanks @5HT)
Wiring priorities working in Comet
Merge branch 'defer-aq'