consumer.go
func StartConsumer(config ConsumerConfig) (c *Consumer, err error) {
	c, err = NewConsumer(config)
	if err != nil {
		return
	}

	c.Start()
	return
}
func StartConsumer(config ConsumerConfig) (c *Consumer, err error) {
	c, err = NewConsumer(config)
	if err != nil {
		return
	}

	c.Start()
	return
}
// StartConsumer creates and starts consuming from NSQ right away. This is the
// fastest way to get up and running.