JOHNE - Flesh in some detail for our pkg-config stuff
JOHNE - Flesh in some detail for our pkg-config stuff

This is a first attempt to add some meaningful detail for later processing by pkg-config (although in the case of MB3Gtk-2, everything was more-or-less right anyway). We mostly need to specify the library requirements / cflags etc, at some point,

johne53/MB3Gtk-2,johne53/MB3Gtk-2,johne53/MB3Gtk-2,johne53/MB3Gtk-2,johne53/MB3Gtk-2