Unable to get quadratic.py running

[zotmeister]

I was able to install cyres after making the changes in #1 . However I am unable to get the example quadratic.py running on my Ubuntu. I ran "python setup.py install" under ../examples/quadratic and I see the package:
/usr/local/lib/python2.7/dist-packages/cost_functions
However I get the following in python:

from cost_functions.wrappers import SimpleCostFunction
Traceback (most recent call last):
File "", line 1, in
ImportError: No module named cost_functions.wrappers

Is there any example as to how I can get a simple example up and running?
Thank you.