Re-ran migration to update schema from restorations made from chapter 7.

DB schema was messed up from losing prior migration files. I went ahead and dropped/created/migrated the db again to get rails up and running.
Re-added password/password_confirmation migration.

The password/password_confirmation migration was missing due to the branching issues made in chapter 7. I manually added it back in and rebuilt the db (drop, create, migrate).