Add Requirements.txt File

[Brandon-Rozek]

I was wondering if you can add a requirements.txt file to this repo. The purpose of this file would be to say which python packages you need to run this project. It also makes it more future proof since pip would know which package versions it needs to install in case of the dependency APIs change.

The easiest way to accomplish this is to run pip freeze > requirements.txt. It might add dependencies that are not needed, but I think the benefits outweigh the cons.

Thanks!