• speedup x16r/x16s in some cases on final step
• fixed regress for simd, so should speedup x16r/x16s and return speed for other algos(bcd, sonoa, etc.)
• added hex algo
• now intensity can be set using sgminer-like numbers(old one supported too)
• improved API a bit, now threads contains hashrate per GPU, not per thread
• fixed GPU numbering at start when --opencl-threads used