This release implements a oneshot running mode generate. This mode will output a file that can be used with the Prometheus file SD. Aside from there is also some testing now done to ensure basic functionality and the service discovery refresh interval respects the X-Prometheus-Refresh-Interval header. I'm not sure if this refresh implementation is a keeper, I think we probably don't wanna follow this header (as the behaviour is with --no-refresh-update flag). This could change in the future.