Officially support Python3

[Nekmo]

According to the setup.py, this module is not compatible with python3. Please Included python3 to the supported versions. Thank you very much.

setup.py
--------
     ...
CLASSIFIERS = [
    'Development Status :: 5 - Production/Stable',
    'Environment :: Web Environment',
    'Framework :: Django',
    'Intended Audience :: Developers',
    'License :: OSI Approved :: BSD License',
    'Operating System :: OS Independent',
    'Programming Language :: Python',
    'Topic :: Communications',
    'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
    'Topic :: Internet :: WWW/HTTP :: Dynamic Content :: Message Boards',
    'Programming Language :: Python :: 2.6',
    'Programming Language :: Python :: 2.7',
]