Add 'Sign Up' button on navbar
Add 'sign-up' modal in UI and handle sign-up form submission for valid user input
Ajaxified sign-up form submission and added tests for users#create
Add shake effect to sign-up form for invalid user input
Add dropdown for logging out - just the UI
Refactor sass files and fix bug on dropdown
Merge pull request #2 from tsufurukawa/features/user_registration

Features/user registration