ZeroMQ integration for route output

Hi all, I've been working on integrating BIRD into some SDN packages (VANDERVECKEN/RouteFlow, ONOS), and as part of this I've built zeromq in as an option. It's still beta, but you can stand up BIRD and poll the ZeroMQ socket and it'll reply with a route table dump in JSON. Keen to hear what people think https://github.com/samrussell/bird/tree/zmqintegration Cheers Sam