gtk+ stuff moving out of Core

[Bill Nottingham]

Daniel Veillard (veillard at redhat.com) said: 
>   I don't want to look painful, but can't we get rid of libxml1 too ?
> And any depending app should really go to Extras IMHO...

Actaully, it looks like, with the above removals, nothing in
Core requires libxml. Extras requires are in:

Gtk-Perl
R-gnomeGUI
(probably via libglade1).

Any volunteers? :)

Bill