Write python test suite

[wbinventor]

Let's setup a system to recreate the hws from last spring. The Python unit testing framework would probably be a good thing to use for this (http://docs.python.org/2/library/unittest.html). If we can simply run "python tests.py" which will execute a series of simulations to generate group xs, RIs, etc for which we already know the answer, then this will help us keep the code debugged in the future.

[wbinventor]

The standard Python unittest module will work: http://docs.python.org/2/library/unittest.html
Alternatively, Paul recommends nose which is the up-and-coming standard: https://nose.readthedocs.org/en/latest/