It has been deprecated for a while in favor of GdkRgba, though in our
case translating ClutterColors to an intermediate color type before
setting _NET_SYSTEM_TRAY_COLORS is a bit silly, so just move to
ClutterColor as the rest of the code base.
notification are to the panel. A bit warty, but we don't know how we want
the final UI to look anyway. (The fact that transparency doesn't work is
a known bug.)
svn path=/trunk/; revision=44