nsq-routing is a fork of nsq 1.2.0

features:

• message with the same routing key will route to the same client

   func (w *Producer) Publish(topic string, body []byte, routingKey string) error {
     return w.sendCommand(Publish(topic, body, routingKey))
    }

• routing msg to channels, no "clone", more like kafka partition
• drain channel data to topic before channel deletion
  • /channel/drain?topic=xx&channel=yy
• clients will have auto-allocated channel with names "default-1" "default-2"...
• messages don't route to channel without active client
• one channel one client
• compatible with original nsq message format and data file