Implement the HTTP OPTIONS method

        :param list args: Positional arguments
        :param dict kwargs: Keyword arguments

def options(self, *args, **kwargs):
        """Implement the HTTP OPTIONS method

        :param list args: Positional arguments
        :param dict kwargs: Keyword arguments

        """
        self.set_header('Allow', ', '.join(self.ALLOW))
        self.set_status(204)
        self.finish()