Update installation instructions
Update installation instructions

https://github.com/nteract/nteract/pull/980

lgeiger/zmq-prebuilt,interpretor/zeromq.js,lgeiger/zmq-prebuilt,interpretor/zeromq.js,interpretor/zeromq.js,lgeiger/zmq-prebuilt,interpretor/zeromq.js,lgeiger/zmq-prebuilt,lgeiger/zmq-prebuilt,interpretor/zeromq.js