More options for logging needed

[ProducerMatt]

It would be good to at least be able to log to disk (log file rotation and compression would be needed given how verbose the logs have to be). Another nice feature would be logging to a remote syslog if the user wants that.

I tried to configure StructLog to log to console and a file simultaneously but it made Stampy malfunction in weird ways. I found StructLog's ways of working very confusing, maybe there's a better alternative?