[gtkmm] Created tag 3.11.8

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '3.11.8' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Tue Mar 4 11:00:32 2014 +0100

    3.11.8

Changes since the last tag '3.11.7':

Juan R. García Blanco (9):
      Gtk::MenuButton: wrap new symbols as of 3.11.7
      Gtk::Entry: add new symbols as for 3.11.7
      Dialog: Add new header bar management methods
      Gtk::Popover: wrap new constructor and public method
      Box: Wrap new *_center_widget() symbols
      ActionBar: wrap new GtkActionBar
      Assistant: Wrap new ::use-header-bar property
      IconInfo: Add is_symbolic() method
      Window: Add ::is-maximized property

Murray Cumming (4):
      Regenerated enums .defs.
      Regenerated methods .defs.
      Regenerate docs XML.
      3.11.8