Added --nostatistics option (Closes #18)

[DerZyklop]

Check #18 for more infos.

[DerZyklop]

Please review carefully. I‘m not quite sure where to implement the if ( '"!${USE_STATISTICS}"') return; checks.

[CodingJonas]

Thanks for the addition, just stumbled over this tool and this option is helpful for my use case!

One addition, please add the newly introduced flags also to the help text defined starting in line 51 :)