Have gnorb-org-popup-bbdb scan the whole subtree

lisp/gnorb-org.el: Not sure why I was limiting it to just the heading.
		   This bring it a little more in line with
		   `gnorb-org-view', and in fact there could be a some
		   sharing of work there
Yeesh, assigning to global variable by accident

lisp/nngnorb.el: nnir-run-gnorb needs to let the "links" variable first.