3.15.10 (unstable);

Gtk:
* Label: Add get/set_xalign/yalign() and properties.
  (Murray Cumming)
* PaperSize: Define the paper name constants in the .cc file
  (Benoît Dejean) Bug #745345

Documentation:
* CssProvider::load_from_data(): Document that this throws an exception.
  (Murray Cumming)
* Icon theme demo: Catch exceptions while loading icons.
  (Kjell Ahlstedt)
* Stock: Mention the named icons for Copy, Cut, Paste and Delete.
  (Murray Cumming) See GTK+ bug #741969