Cosmetical changes to ntlmv2 & krb5pa-md5 kernels.
Revert to outputting to stdout (not stderr) for dump_stuff*() functions.
Vectorize rakp-opencl and choose vector width according to what device
says is best (up to 8 currently supported).
Also drop old crappy find_best_kpc() function. We should use the shared
one but this format is not very critical on GWS anyway.
Update README-OPENCL regarding vectorized formats.