Directories/Subdirectories and pip install

[stompsjo]

This is a good S/W question about best-practices and intended use-cases. Right now, major RadClass scripts are contained in three folders: RadClass/, models/, and scripts/. We also have setup.py that allows for RadClass to be packaged/installed with pip (i.e. pip install .).

As far as I can tell with local testing, the way setup.py is currently written means that only scripts in RadClass/ will installed as part of the RadClass pip package. If true, we either need to move scripts/ and models/ under RadClass/ (assuming those should be package, which I think they should be) or we need to specify the additional directories in setup.py.