use standard api instead of platform dependent literal.
Merge pull request #34 from taichi/hosts

use standard api instead of platform dependent literal.
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.
sandbox code.