use libnotify and libwnck, not mate forks

patches by spturtle, from
http://www.time4t.net/~cjw/mageia/cauldron/SOURCES/mate-notification-daemon-1.5.0-libwnck.patch
http://www.time4t.net/~cjw/mageia/cauldron/SOURCES/mate-notification-daemon-1.5.0-libnotify.patch