Arch Linux

I attached an improved package and diff file with the following changes:
- gnome-desktop-sharp is splitted since a while, so replace with libgnome-sharp, gtkhtml-sharp and gconf-sharp
- remove gluezilla dependency: it's a broken package, and should be dropped from [extra] repository (fix for  FS#23553 )
- remove gecko-sharp-2.0 makedependency: mono-tools fails to build with it
- it seems that it's a platform-independent package, so it should be any
- do not call update-desktop-database, because the .desktop files doesn't contain any MIME type
- call gtk-update-icon-cache for the icon
- split into build() and package()
- remove some unused patches from source

Monodoc requires at least one rendering engine. I recommend to use only the gtkhtml engine, because gluezilla and gecko-sharp are not works. webkit-sharp works, but buggy: some links are not works in monodoc, and crash on quit.