JOHNE - Modify 'win32-fixup.pl' so that we auto-generate the GTK icon cache (gtkbuiltiniconcache.h)
JOHNE - Modify our MSVC projects so that they use the auto-generated icon cache (gtkbuiltiniconcache.h)
JOHNE - Add 'gtkbuiltincache.h' to our ignore list (now that we're auto-generating it)