Benchmark beta
Add Benchmark

#	Hashrate	1 thread	Size	Duration	CPU	Threads	Version
1	1955.61	488.90	1MH	511.350	1	4	6.6.2
2	1751.38	583.79	1MH	570.978	1	3	6.6.2
3	643.57	643.57	1MH	1553.836	1	1	6.7.0
4	639.73	639.73	1MH	1563.165	1	1	6.6.2