Flowchart

[squilter]

Add a nice picture of a flowchart to the readme to explain what nodes do what.

[sudotong]

Here's the current version:

https://docs.google.com/drawings/d/1pEXLmtJdsz47rTtTsYSUHnWhozt7BHIU79rg13Oizco/edit?usp=sharing

Let's make one thats a bit cleaner