Eventlet 0.12

[Sergey Shepelev]

Eventlet is a concurrent networking library for Python that allows you to change how you run your code, not how you write it.

http://pypi.python.org/pypi/eventlet/0.12.0
This release features important bug fix of zmq bind(PUB) 100% busy CPU
in idle. Thanks to Geoff Salmon.

Also:
* greenio: Fix socket.settimeout() did not switch back to blocking
mode. Thanks to Peter Skirko.
* greenio: socket.dup() made excess fcntl syscalls. Thanks to Peter Portante.
* setup: Remove legacy --without-greenlet option and unused httplib2
dependency. Thanks to Thomas Grainger.
* wsgi: environ[REMOTE_PORT], also available in log_format, log accept
event. Thanks to Peter Portante.
* tests: Support libzmq 3.0 SNDHWM option. Thanks to Geoff Salmon.