py-netaddr: updated to 0.9.0

Release: 0.9.0

Added:

* Add hash capabilities to OUI

Fixed:

* **Backwards incompatible:** Handle RFC 6164 IPv6 addresses (don't reserve first IP
  address in point-to-point subnets) ($267, Damien Claisse)
* **Technically backwards incompatible:** Fix for is_loopback behaviour – consider
  ``IPNetwork('::1/128')`` to be loopback
* Include tutorials in source distributions
* Fix a documentation typo
* Fix print syntax in the documentation to be Python 3 compatible
* Fix the Sphinx syntax in the documentation

(adam)