JRuby Nailgun Support in 1.3.0

Charles Oliver Nutter Java, Ruby, and JVM guy trying to make sense of it all I've merged changes into master (to be 1.3 soon) that should make Nailgun easier to use. And 1.3 will be the first release to include all NG stuff in the binary dist. jruby --ng-server starts up a server. You can manage it however you likejruby --ng uses the Nailgun client instead of launching a new JVM for the command yo

[netiron]

JVMの再利用? で，高速にJrubyを動作させる