libgnome dependencies

[Jani Monoses <jani monoses gmail com>]

This patch contained the removal of the last libgnome bits
http://bugzilla.gnome.org/show_bug.cgi?id=460671

until the recent move of vpn-properties code from the NetworkManager module
made those not 'the last' :)

The vpn code uses GnomeDruid which is replaceable by GtkAssistant (GTK >=2.10).

Should that be done with ifdef on GTK 2.10 or can it be safely assumed that
0.7 will be used on systems and distros with 2.10 (which is over one year old)
and just remove GnomeDruid code?

thanks
Jani