Benchmark beta
Add Benchmark

#	Hashrate	1 thread	Size	Duration	CPU	Threads	Version
1	6151.27	307.56	1MH	162.568	3	20	6.7.2
2	5601.11	280.06	1MH	178.536	3	20	6.7.2
3	8002.02	250.06	10MH	1249.684	2	32	6.18.1