foo2zjs

foo2hbpl2: flush output after each page to avoid printer timeout

foo2hbpl2: process 32 bits rather than 4 bits at a time in cmyk_planes

foo2hbpl2: simplify expressions in cmyk_planes

foo2hbpl2: speed up AnyColor checking in pksmraw mode

foo2hbpl2: only encode color planes when needed, not for B/W images