To fully appreciate this tutorial, a rudimentary understanding of ledger
[http://www.ledger-cli.org/], double-entry accounting
[https://en.wikipedia.org/wiki/Double-entry_bookkeeping_system], and envelope
budgeting [http://www.daveramsey.com/blog/envelope-system-explained] will be
necessary.
The Goal:
* An envelope budgeting system similar to YNAB
* Envelopes that "roll-over" and don't