See #490 discussion.
This reverts commit 1278859d31, reversing
changes made to 0c020c98f9.
Conflicts:
pkgs/desktops/xfce/core/xfce4-session.nix (take master)
pkgs/lib/misc.nix (auto)
gtkLibs224.gtk actually propagates libpng etc. through gdk_pixbuf,
so using gtk.libpng etc. makes no sense.
Remove unused 'inherit lib*;' in gtk.
svn path=/nixpkgs/trunk/; revision=29383
* Added gdk-pixbuf, which has been revived and is required by GTK+.
* Don't install the documentation of aforementioned packages. This
cuts 56 MiB off the closure of GTK+-based packages. It wasn't
really useful anyway because it's not installed in a way that allows
users to find it easily on NixOS. And if you want it, it's faster
to Google it.
svn path=/nixpkgs/branches/x-updates/; revision=25853