2.13.1:

Gtk:
* Bin: add_label(): Correct the order of parameters to the Label constructor.
  (Peter Wainright) Bug #534685.
* Entry: Added the shadow_type property (added to GTK+ in 2.12).
  (Gennaro Bellizio) Bug #532744.
* RecentInfo: Added a specialization for
  Glib::Value<Glib::RefPtr<Gtk::RecentInfo> > so that
  Glib::RefPtr<Gtk::RecentInfo> can be used with Glib::Value<> and
  Gtk::TreeModelColumn<>.
  (Armin Burgmeier)
* Widget: get_direction():  Add a const version and deprecated the non-const 
  version.
  (Andreas Klaedtke) Bug #526742.
* Window: Added unset_back_pixmap().
  (Murray Cumming). Bug #525967 (Jonathon Jongsma).

Gdk:
* PixbufAnimationIter: Added get_pixbuf(), get_delay_time(), advance(), 
  on_currently_loading_frame().
  (Murray Cumming). Bug #528037 (Balazs Tirpak).

Pango:
* Attributes: gobj(): Correct the const qualifier. We don't think this will affect 
  ABI, but please tell us if it does.
  (Dodji Seketeli)

Documentation:
* Image: Document the constructors.