The project has apparently moved from Google Code to GitHub. Update the
link in setup.py.

Remove ez_setup

ez_setup was a workaround from the dark days of Python packaging, before
setuptools and pip were common on machines. setuptools is almost
universally available these days. So, we stop using ez_setup and just
use setuptools directly.

For reference, the current version of the Python Packaging User Guide
(https://python-packaging-user-guide.readthedocs.org/en/latest/distributing.html)
recommends using setuptools directly from setup.py.

Switch to modern packaging

django-evolution is currently distributed using egg packaging via
http://downloads.reviewboard.org/. This is problematic for 2 main
reasons.

First, egg packaging is old and dated. The Python Packaging User Guide
recommends wheels and source distributions, not eggs. This patch rips
out references to eggs and replaces them with wheel support.

Second, distribution over plain text via downloads.reviewboard.org makes
pip and people wearing security hats unhappy. Python packages should be
distributed over a TLS-secured transport. Most Python packages use
https://pypi.python.org/. I believe django-evolution should too.

This patch assumes that PyPI will be used for distribution going
forward. As such, references to the old download URL have been removed.
Instead, pip/PyPI will do their discovery dance to find available
packages (presumably wheels).

After this patch is incorporated, a new release can be made to PyPI by
following the instructions at
https://python-packaging-user-guide.readthedocs.org/en/latest/distributing.html#uploading-your-project-to-pypi

pip wheel . and python setup.py bdist_wheel both seem to work.