* glib/dbus-glib.c (dbus_g_pending_call_set_notify): new function
(dbus_g_pending_call_cancel): new function
* dbus/dbus-glib.h: move GType decls for connection/message here;
* dbus/dbus-glib.c: move all the g_type and ref/unref stuff in
here, just kind of rationalizing how we handle all that
* tools/dbus-names-model.c: new file for a tree model listing the
services on a bus
* tools/dbus-tree-view.c (model_new): use proper typing on the
model rows
