Standard simple NonBlockingServer using New I/O.
add comment.
refact NonBlockingServer.
add Handler interface.
Add AcceptHandler, implement Handler class.
add IOHandler class, implement Handler.
fix.
Add SocketAgent class, connect to New I/O Server.
mumu
green
add msgpack mvn package to pom.xml.
Merge branch 'server'

Conflicts:
	agent/pom.xml
	agent/src/main/java/net/karahiyo/airypicker/agent/util/CommandListener.java