o Somehow escape comments where a line starts with an option name
o 'help' should list commands in declaration order
o 'help' should use all levels by default
o 'help' should always include top-level options (try setting levels: 10 and
  see top-level options are gone
o Special handling of --help arguments so that '--help command' is possible
o Support for paging of help:
    begin 
      file = Tempfile.new("prick") 
      file.puts HELP.split("\n").map { |l| l.sub(/^  /, "") } 
      file.flush 
      system "less #{file.path}" 
    ensure 
      file.close 
    end