Halfway implement a compressor forked from the limiter, then just
comment it all out anyways...

Compressors aren't that useful for EDM (true story), perhaps for
certain types of recording tasks and so on, so I'm going to
de-prioritize it for now since PyDAW is not really aimed at recording
bands and such anyways, and focus on the  reverb + some other stuff
for the next minor release.

The compressor could still make the next minor release, but I just
became apathetic towards it because it seems a little pointless ATM.
The limiter that's already there does a fine job for any of my use
cases, and I'll encourage others to try it as well for theirs...