Some updates to README-OPENCL. This whole file should be reworked but
I am not the man.
Reduce global work size to 'count' in more OpenCL formats, speeding up self-test
and helping Single mode a lot. Also some bugfixes. And unify the various non-split
pbkdf2 kernels we had, so there is only one to maintain. RAR is currently b0rken.
Merge branch 'unstable-jumbo' into bleeding-jumbo

* unstable-jumbo:
  Reduce global work size to 'count' in more OpenCL formats, speeding up self-test and helping Single mode a lot. Also some bugfixes. And unify the various non-split pbkdf2 kernels we had, so there is only one to maintain. RAR is currently b0rken.
  Some updates to README-OPENCL. This whole file should be reworked but I am not the man.

Conflicts:
	src/opencl_nt_fmt.c