Merge pull request #50 from boiving/master

Update docs
Bug fix : ZMQ was enforcing a policy of 1024 max sockets. Increase to 1000000. Required patch version of node zmq
Merge pull request #51 from bnadim/master

Increase max_sockets limit in zmq
Package update for zmq
Merge pull request #52 from bnadim/master

Package update for zmq error
Update package.json
HUB-379 : callback must use a single msgid