readme: update authors with maintainers and contribution disclaimer
readme: update authors with maintainers and contribution disclaimer

ploxiln/nsq,mreiferson/nsq,rpau/nsq,jehiah/nsq,ploxiln/nsq,nsqio/nsq,mreiferson/nsq,nsqio/nsq,bitly/nsq,jehiah/nsq,rpau/nsq,bitly/nsq,bitly/nsq,ploxiln/nsq,ploxiln/nsq,bitly/nsq,ploxiln/nsq,jehiah/nsq,mreiferson/nsq,jehiah/nsq,rpau/nsq,rpau/nsq,rpau/nsq,jehiah/nsq,mreiferson/nsq,mreiferson/nsq,nsqio/nsq,bitly/nsq,nsqio/nsq,nsqio/nsq