Compatibility with node 0.10.*
* Upgrade node zeromq to version 2.*
* Moving from msgpack2 to msgpack package
Cancels timed-out request on the client side.
Adds the linger time to the close function to enable the lazy pirate pattern.
Merge pull request #23 from eelcocramer/master

Enable the lazy pirate pattern by allowing to add a linger time when closing the client socket