Celluloid::IO::ServerCell framework

[tarcieri]

I think it'd be good to do an extraction of the connection management logic that Reel uses into a generic, repurposable server framework for any kind of Celluloid::IO::Stream-derived server (i.e. TCP, TLS, or Unix domain)

Perhaps this framework could compose things correctly so we can generally address problems like celluloid/reel#92 for all Celluloid::IO-based servers.

I think this sort of high level framework that wraps up the connection management logic is the reason why people like frameworks like EventMachine and Node.js in the first place.