First commit
Chapter 5

Just completed chapter 5.
Chapter 6 Completed

Completed Chapter 6
Chapter 7 Completed

Completed Chapter 7 and started adding associations to models. Also,
ran gem update
Add config/database.yml to .gitignore
Revert "Add config/database.yml to .gitignore"

This reverts commit eb960119e3ad379c5ce67efd8bdd6cf6b9fec98e.