Print freight forwarder info to the user.

def _info(self, args, **extra_args):
        """Print freight forwarder info to the user.
        """
        if not isinstance(args, argparse.Namespace):
            raise logger.error(Exception("args should of an instance of argparse.Namespace"))

        logger.info("Freight Forwarder: {0}".format(VERSION))
        logger.info("docker-py: {0}".format(docker_py_version))
        logger.info("Docker Api: {0}".format(DOCKER_API_VERSION))
        logger.info("{0} version: {1}".format(platform.python_implementation(), platform.python_version()))