Gtk3 0.027 available

Overview of changes in Gtk3 0.027 [2016-06-05]; Gtk3::FileChooserDialog: fix typo in usage warning (RT#114506). Gtk3 is available via CPAN, or as a tarball from Sourceforge http://downloads.sourceforge.net/gtk2-perl/Gtk3-0.027.tar.gz (http://bit.ly/1stPpQn), or view the source in the Gtk3-Perl git repo http://git.gnome.org/browse/perl-Gtk3/tag/?id=v0.027 (http://bit.ly/1stOyzb).