OptionParser is yet another command line option parser for Ruby. 

Features: 
  * describe option definition with its handler
  * specify argument format and convert automatically 
  * can emit options' summaries
  * can add options on the fly 
  * completion for option/argument

Author: Nobuyoshi.Nakada <nobu.nokada@softhome.net>
WWW:	http://www.ruby-lang.org/en/raa-list.rhtml?name=OptionParser