Add pry gem for debugging
Add devise gem and configurations to enable authentication
Added user model with devise authentication
Add authentication to entire application
Make marketing pages available without authentication
Add devise test helpers for authentication in tests
Add basic user factory
Add basic seed user
Add user resources to routes
Add basic user index view
Add cancan gem and configuration to enable authorization
Add is_admin column to user model
Add basic abilities to control authorization
Edited seed data to include admin and regular user
Add admin factory
Edit test to sign in admin instead of user
Add load_and_authorize_resource to user model to control authorization
Added gravatar_url method to user model
Renamed helper methods to remove render from each method name
Add conditional partials to nav