Design Phase 3 - tfl-book v0.3.0 - simtfl results & PoS Goals / Reqs

[nathan-at-least]

Suggested Improvement

This is a capstone issue for Design Phase 3 with these major goals:

• Define the goals, requirements, and desiderata of the PoS Subprotocol.
• Incorporate the initial simtfl results into the book.