Documentation on model

[chrisnatali]

A simple intro to the model (say for a student or new developer):

This is what we have from the past model:
https://www.dropbox.com/s/nhxacurefg8svm6/Notes_ExcelModel_V1.pdf?dl=0
https://www.dropbox.com/s/zi5vtf0qadqa42r/SystemDescriptionLATEST_JAN22.pptx?dl=0