[gtkmm] Created tag 3.19.3

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '3.19.3' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Sun Nov 29 22:15:16 2015 +0100

    3.19.3

Changes since the last tag '3.18.0':

Kjell Ahlstedt (1):
      tests/object_move: Derive from Gtk::Object, test move assignment

Murray Cumming (10):
      NEWS: Add what's new in 3.18.
      Gtk::Object: Use of the override keyword.
      C++11: Stack: Use of override keyword.
      C++11: tests/examples: Use override keyword.
      Use -Wsuggest-override with --enable-warnings=fatal.
      Regenerate gdk .defs
      Regenerated some gtk .defs.
      Gdk::Rectangle: Add operator==().
      Depend on latest glibmm, pangomm, atkmm.
      3.19.3