Guides - Chapter 3

- Wrote guide for Chapter 3
- Addressed Home Run's appearance
- Addressed need for Teachable Moment

Fixes #13, Fixes #21, Fixes #22
Merge pull request #38 from RampantArcana/Chapter-Addition/Chapter-3

Guides - Chapter 3

- Wrote guide for Chapter 3
- Addressed Home Run's appearance
- Addressed need for Teachable Moment

Fixes #13, Fixes #21, Fixes #22