Create iSIM package for pip installation
A setup.py script was created for easy "pip install -e ." command. In order to do this some modifications needed to be made. I am reorganizing all isim_*.py code into an iSIM directory. In doing so I removed the isim prefix to all scripts. All scripts in package are imported through an iSIM import. I have changed all imports in the .py scripts to be compatible with this. At current I have not changed the ipynb, but will before merging.
I have begun some scripts to establish tests for the code as well. However, I think for organization sake this is better done in its separate pull request. I don't want to merge too much at one time. So we can discuss further in the meeting monday.