[arch-general] Moving kpovmodeler and kgraphviewer to unsupported

I plan to move both packages to unsupported: * kpovmodeler isn't maintained upstream anymore and homepage is dead. it doesn't work anymore with upstream povray with third party patches. (see https://bugs.archlinux.org/task/36352) * kgraphviewer isn't maintained upstream anymore except cosmetic patches, and will not work with graphviz-2.34.0 in staging without deep changes. -- Laurent Carlier ArchLinux Developer http://www.archlinux.org