Wrong hashrate calculation

Hashes are not bytes:
> 1 byte = 8 bits
> 1 kilobyte = 1024 bytes

Hashes are the units, and so therefore - as `k`,  `m` only mean *10^3 and *10^6
> 1 hash = 1 hash
> 1 kh     = 1000 hashes
Merge pull request #333 from kaosdynamics/patch-1

Wrong hashrate calculation