Benchmark beta
Add Benchmark

#	Hashrate	1 thread	Size	Duration	CPU	Threads	Version
1	2384.26	298.03	1MH	419.417	1	8	6.7.0
2	2299.97	287.50	1MH	434.789	1	8	6.7.0
3	2037.59	254.70	1MH	490.776	1	8	6.7.1
4	1937.83	242.23	1MH	516.040	1	8	6.7.2
5	1925.42	240.68	1MH	519.367	1	8	6.7.0