New PhotoFlow windows package for testing

Not for that version. Instead, there should be a photoflow-w64-20170716 package appearing soon here, for which I forced the architecture/tuning to be

-march=nocona -mno-sse3 -mtune=generic

If you could give this version a try it would be really great! At least, it should cure the “illegal instruction” problems of the previous one…

Thanks!!!