Version bump to 1.2.4
add build script.
move jrubyVersion to build.gradle.
add eclipse specific settings.
modify Rakefile for JRuby and add minimum skelton java codes for rspec.
split Watchers.
add Loop skeleton.
add Utils.
add IOBuffer
add Netty4 to dependency.
add compile task and javaclean task to Rakefile.
split build.gradle
sandbox code.
 RubySocket can't make on Netty. so some class is refine on JRuby.
add IO
add shoutdown to Coolio module.
use module instead of meta.
use ArgmumentError instead of IllegalArgumentException
suppress errors when using -d option.
comment out .jruby/jruby-1.7.12/lib/ruby/shared/fiddle/jruby.rb#L2
add Server.java