Get minimum authentication system working
Get all visit_homepage features working again
Complete Feature: User signs in
Complete Feature: User signs in with invalid info
Add User.rb validations for email and password
Complete Feature: View the index of users
Complete Feature: View an individual user
Complete Feature: Update a user with valid attributes
Complete Feature: Update a user with invalid attributes
Complete Feature: Delete User
Style Devise forms
Complete authorization of Artists controller for logged in users excect index and show actions
Authorization for artworks controller
Add authenticate_user! filter to UsersController actions
Finish Authorization for User pages