3.1.10 (unstable):

Gtk:
* Adjustment: Added get_minimum_increment().
* ButtonBox: Added get_child_non_homogeneous() and
	set_child_non_homogeneous().
* CellArea: Added get_focus_siblings().
* CssProvider: Added to_string(), 
* Entry: Added get_placeholder_text(), set_placeholder_text(),
	and placeholder-text property.
* Expander: Added set_resize_toplevel(), get_resize_toplevel() 
	and resize-toplevel property.
* PrintJob: Added set/get_pages(), set/get_page_set(), 
	set/get_num_copies(), set/get_scale(), set/get_n_up(), set/get_n_up_layout(),
	set/get_rotate(), set/get_collate(), set/get_reverse().
	(Murray Cumming)
* Tooltip: Add unset_*() methods.
  (Jonathon Jongsma) Bug #541296
* TreeViewColumn: Added get_x_offset().
* Added several other properties to various classes.
  (Murray Cumming)