Use module to for sidekiq example

Thanks for creating Eye! It's working well so far as a replacement for God.

I had to create several Sidekiq watches for my application. I came up with an elegant approach using a module, which avoids having to pass the proxy class around.
You should send `:USR1` first, so `sidekiq` will not pick up new jobs, then `:TERM` to stop `sidekiq` gracefully and `:KILL` if it won't stop.

Take a look at `sidekiqctl` https://github.com/mperham/sidekiq/blob/master/bin/sidekiqctl#L56-L79