Adds Notes on Getting Started with NWChemEx and Python

[ryanmrichard]

I need the ability to interact with NWChemEx through Python, so I'm documenting my struggles so the next person will have a much easier time.

TODO:

• [x] Get Python bindings working
• [x] Write a Python module

[ryanmrichard]

This documentation gets me up and running with Python. I'll tweak the PluginPlay documentation to describe how to write modules.

[ryanmrichard]

r2g.