Add Setup.py

Added package to pypi: https://pypi.python.org/pypi/django-bisnode/0.0.1

Package can now be installed via pip.

@anah - If you make a user on PyPi here: https://pypi.python.org/pypi?%3Aaction=register_form then I can make you an owner of this and our other PyPi packages so you can update them by running:

    python setup.py sdist upload