Removing libgnome* from nautilus

[Alexander Larsson <alexl redhat com>]

I just branched nautilus because I want to work on a small project I
have. I want to remove all uses of libgnome, libgnomeui and all the
related libs from nautilus. These are not really important to nautilus
anymore, and are a large dependency that we mainly don't need.

Hopefully this shouldn't be to much work. I'll start today with
commiting a removal of the last use of bonobo (we currently use it for
"unique application" functionallity).