code: private static Options constructGnuOptions() {
  	final Options gnuOptions = new Options();
  
  	gnuOptions.addOption("d", DEBUG_OPTION, false, "Print debug information")
  		.addOption("q", QUIET_OPTION, false, "Quiet output. Doesn't work if --" + DEBUG_OPTION + " specified.")
  		.addOption("h", HELP_OPTION, false, "Print usage information");
  
  	return gnuOptions;
      }
docs: Constructs the set of GNU options.
  
  @return - The constructed options.