ioexpand.py is missing?

I've been trying to get this going on my pi, and it can't find the 'ioexpand' library. I've searched around but i can't seem to find it, and it's not available via pip.

```
# python supervisor.py
Traceback (most recent call last):
  File "supervisor.py", line 5, in <module>
    from ioexpand import *
ImportError: No module named ioexpand
```
