Version 0.0.3

Squashed commit of the following:

commit b7a420372d877bdc0f0031f3c7e082f8a4ec5dd0
Author: HARUYAMA Seigo <haruyama@unixuser.org>
Date:   Thu Jan 30 19:51:37 2014 +0900

    use TubeAddress instead of IPAddr

    https://github.com/jordansissel/experiments/blob/master/ruby/ipaddr-is-slow/code.rb