Listen's priorities have drastically changed since it was created. Time to deal with major problems.

Current the major issues are:

1. Hard to maintain codebase
2. Performance issues on OSX (related to 1.)

Proposal for Listen 3.x

Proof-of-concept PR here: #318

1. Removed TCP, since that should be in 2 separate gems (e.g. listen-server and listen-client)
2. Removed Celluloid, since it's unnecessary in Listen itself (Listen should be a library and not an "app")
3. Adapter config instead of global config (silencer, one Record object per watched directory)

Feedback

Highly appreciated here - even being picky about minor stuff (since that can suggest other important refactorings).

/cc - @thibaudgg , @rymai