added trivago/gollum to messaging category
@@ -684,6 +684,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
* [go-nsq](https://github.com/nsqio/go-nsq) - the official Go package for NSQ
* [go-socket.io](https://github.com/googollee/go-socket.io) - socket.io library for golang, a realtime application framework.
* [go-vitotrol](https://github.com/maxatome/go-vitotrol) - A client library to Viessmann Vitotrol web service.
+* [Gollum](https://github.com/trivago/gollum) - A n:m multiplexer that gathers messages from different sources and broadcasts them to a set of destinations.
* [golongpoll](https://github.com/jcuga/golongpoll) - HTTP longpoll server library that makes web pub-sub simple.
* [goose](https://github.com/ian-kent/goose) - Server Sent Events in Go
* [gopush-cluster](https://github.com/Terry-Mao/gopush-cluster) - gopush-cluster is a go push server cluster.
