Add semantic-ui-sass
Setup guard-livereload
Home page
Create User model.
Add User username_lower attribute
Add User email_lower attribute
Add slim template
Sign up page.
Sign up create user logic
User create logic
User remember token
Add form validation for signup page
Change sign up column display order
Session controller
Sign out action
Store location when params return_to exists.
Init Topic and Post model
Change sign up/in segment to stacked