[gtkmm] Created tag 3.15.9

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '3.15.9' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Fri Feb 27 08:41:06 2015 +0100

    3.15.9

Changes since the last tag '3.15.4':

Kjell Ahlstedt (10):
      Gtk::TextBuffer: Wrap the serialize()/deserialize() methods
      Gtk::StyleContext, Widget, Window: Deprecate API which is deprecated in GTK+
      demos: Replace calls to deprecated API
      Gtk::Container: Remove obsolete comments that confuse doxygen
      Regenerate gtk .defs and docs.xml files
      Wrap GtkStackSidebar
      demos: Add stacksidebar demo
      Gtk::StackSwitcher: Add unset_stack()
      Delete obsolete .defs files
      Fix error messages from gmmproc

Murray Cumming (5):
      Gtk::Window: Split WindowGroup into its own .hg/.ccg file.
      Doxygen file: Remove deprecated XML_SCHEMA and XML_DTD.
      class_gtkobject.m4: Put DOXYGEN_SHOULD_SKIP_THIS around *_Class prototypes.
      Device: Add get_vendor_id() and get_product_id().
      3.15.9