Add real-time and final hashrate standard deviation calculations to benchmark output#8

pwschattenberg wants to merge 2 commits intomrv777:mainmrv777/Bitaxe-Hashrate-Benchmark:mainfrom

pwschattenberg:feature/standard-deviationpwschattenberg/Bitaxe-Hashrate-Benchmark:feature/standard-deviationCopy head branch name to clipboard