Create Users controller
Create some view helpers and partials
Create User model
Rollback all previous migrations. Migrate Users table
Ensure email uniqueness
Add password digest to Users table
Add validation to User signup
Route using :username
Add Sessions controller
Complete user signup/signin
Complete Users and Sessions controllers
Create Item model
Create Category model
Show items on user's page
Implement Items create, show and destroy
Change Homepage
Modify .gitignore