3.1.90 (unstable):

Gtk:
* FontChooser is now an interface, like AppChooser and
* FontChooserDialog: Derive from FontChooser, removing some methods.
* FontChooserWidget: A new widget derived from FontChooser.
* FontButton: This should now derive from FontChooser but 
	we cannot do that without breaking ABI because FontButton was in gktmm 3.0.
  (Murray Cumming)
* TreeView: Make append_column_numeric_editable() work for [unsigned] short.
  (Kjell Ahlstedt) Bug #655416 (Morpheus)
* Widget::get_allocation(): Add the newer documentation from the C docs.
  (Murray Cumming)