Add meaningful docstrings

[KingNook]

Context

(See comment in #12) Not necessarily high priority but the project is starting to get a little large and I will inevitably begin to forget what, why or how functions work. To prevent this / alleviate the symptoms, I wanna give each function / method a meaningful docstring

Thoughts / Challenges

There's probably a PEP somewhere with relevant information so I'll try to follow that guideline once I find it. If not I'll figure out my own standard.