[gtkmm] Created tag 3.7.12

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '3.7.12' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Fri Mar 8 10:48:08 2013 +0100

    3.7.12

Changes since the last tag '3.7.10':

Kjell Ahlstedt (6):
      Modify the deletion of widgets.
      Gtk::ScaleButton, Toolbar: Delete the "orientation" property.
      Update gdk_docs.xml and gtk_docs.xml.
      Split tools/extra_defs_gen files into gdk and gtk parts.
      Update the .defs files.
      Gdk::EventType, Gtk::MenuButton, Window: Adapt to the updated .defs files.

Murray Cumming (2):
      Fix the build with the lastest GTK+ from git master.
      3.7.12