Update py-zmq to 14.4.1.

14.4.1
======

Bugfixes for 14.4

- SyntaxError on Python 2.6 in zmq.ssh
- Handle possible bug in garbage collection after fork

14.4.0
======

New features:

- Experimental support for libzmq-4.1.0 rc (new constants, plus :func:`zmq.has`).
- Update bundled libzmq to 4.0.5
- Update bundled libsodium to 1.0.0
- Fixes for SSH dialogs when using :mod:`zmq.ssh` to create tunnels
- More build/link/load fixes on OS X and Solaris
- Get Frame metadata via dict access (libzmq 4)
- Contexts and Sockets are context managers (term/close on ``__exit__``)
- Add :class:`zmq.utils.win32.allow_interrupt` context manager for catching SIGINT on Windows

Bugs fixed:

- Bundled libzmq should not trigger recompilation after install on PyPy

14.3.1
======

.. note::

    pyzmq-14.3.1 is the last version to include bdists for Python 3.3

Minor bugfixes to pyzmq 14.3:

- Fixes to building bundled libzmq on OS X < 10.9
- Fixes to import-failure warnings on Python 3.4
- Fixes to tests
- Pull upstream fixes to zmq.ssh for ssh multiplexing

(obache)