2.9.8:

Gtk:
* Printing API mostly finished. (Marko Anastasov)
* TextBuffer: Added register_serialize_tagset(), unregister_serialize_format(), 
  unregister_deserialize_format(), set_can_create_tags(), get_can_create_tags(), 
  get_serialize_formats(), get_deserialize_formats(). There's more to do.
  (Murray Cumming)
* ToggleButton: Added constructor that takes a stock item.
* Widget: Added is_composited(), input_shape_combine_mask(), 
  unset_input_shape_combine_mask(), and the "composited_changed" signal.
  (Jonathon Jongsma)

Documentation:
* Added Printing chapter and printing example. (Marko Anastasov)
* Added "Wrapping C libraries" appendix. (Murray Cumming)
* Style updated to match the new website. (Jonathon Jongsma)