See also https://bugzilla.gnome.org/show_bug.cgi?id=752638 for updates on integration into GTK+ 2 and GTK+ 3
git-svn-id: svn://localhost/ardour2/branches/3.0@12038 d708f5d6-7413-0410-9779-e7cbd77b26cf
git-svn-id: svn://localhost/ardour2/branches/3.0@4313 d708f5d6-7413-0410-9779-e7cbd77b26cf