Glib::
* RefPtr: Make it possible to stop use of RefPtr with certain classes.
(Kjell Ahlstedt) Bug #755048
* WeakRef: Use noexcept.
(Kjell Ahlstedt) Bug #583399.
Gio:
* Application: Remove bind/unbind_busy_property() because they are not
quite ready.
(Murray Cumming)
Gio::Dbus:
* Connection::signal_subscribe(): Pass nullptr instead of "".
(Murray Cumming)
