Change setup.py so wheels can be built

```
In order to built a Python wheel for the straightener, I have to change the 
line in setup.py:

from distutils.core import *

to:

from setuptools import setup, Extension

without it, "setup.py bdist_wheel" will not work.
```

Original issue reported on code.google.com by `rob...@gmail.com` on 8 Apr 2014 at 3:58
