golang-zmq-comparison

Compare various ZMQ libraries for use in Golang

So far, I only intend to use the PUB/SUB feature. There will be tests to make sure I have the API correct, and then a benchmark of some kind.

1. pebbe/zmq4 at https://github.com/pebbe/zmq4 with documentation
2. goczmq at https://github.com/zeromq/goczmq is the one we've been using in Dastard
3. gomq at https://github.com/zeromq/gomq (its README claims it's very immature)
4. zmq4 at https://github.com/go-zeromq/zmq4