Init a new OptionArray with a help message and names.

Property definitions

opts $ OptionArray :: defaultinit
	# Init a new OptionArray with a `help` message and `names`.
	init(help: String, names: String...) is old_style_init do
		values = new Array[String]
		super(help, values, names)
	end
lib/opts/opts.nit:267,2--271,4