Benchmark beta
Add Benchmark

#	Hashrate	1 thread	Size	Duration	CPU	Threads	Version
1	13862.24	462.07	10MH	721.384	2	30	6.19.0
2	13572.02	452.40	1MH	73.681	2	30	6.19.0
3	12535.57	208.93	1MH	79.773	4	60	6.19.0
4	9247.44	616.50	1MH	108.138	1	15	6.20.0
5	9012.01	600.80	1MH	110.963	1	15	6.18.0