Forward compatibility with upcoming EventLoop v1.0 and v0.5 (#46 by @WyriHaximus, #53 and #54 by @edusalguero)

Suport evenement 3.0 and 2.0 (#41 by @jsor)

Improve docblock for Zmq\Context (#34 by @M1ke)

Fixed only handling new events when there is an open socket in handleEvent (#30 by @khelle, #49 and #50 by @edhelas, and #57 by @WyriHaximus)

Change layout to PSR-4