Utilize Tabular Editor to track changes over time

[DavidmSalm]

Re: #55 & #64

This PR adds the model exported using Tabular Editor's export to folder feature.

Benefits:

• Track changes over time
• Assist with quicker review of all changes
• Allows quicker iterations
• Allow users to make modifications and keep up to date with later releases, e.g., we use 'FY19' instead of 'F 2019'. Right now we need to make that change every time the Calendar is updated instead of just pulling in new changes.