[system-config-printer] (2 commits) ...Don't call into Gtk directly from scp-dbus-service (bug #951710).

[Tim Waugh]

Summary of changes:

  45d2fb8... Adjusted dependencies now we use GObject introspection. (*)
  2dac84f... Don't call into Gtk directly from scp-dbus-service (bug #95 (*)

(*) This commit already existed in another branch; no separate mail sent