fix travis image to filter to master
go-nsq: speed up Writer heartbeat test and cleanup Writer exit
go-nsq: only send on readyChan when it's a message
go-nsq: IsStarved should use *last* RDY count
go-nsq: auto-reconnect when using hard-coded nsqd addrs
go-nsq: redistribute RDY state when num_conns > max_in_flight