Consider using package_data instead of data_files

Consider using the `package_data` parameter in the setup.py script instead of the `data_files`.  It allows you to use glob patterns to specify which data files to put in the package, e.g.

```python
package_data={'pyw3x':['data/storm/*.*', 'data/storm/win-64/*.*']}
```

(from https://github.com/sethmachine/pyw3x/blob/master/setup.py)