adds view file for index page
adds index controller file
adds post route for sign up and adds sign up logic to user model
slightly modifies view to test sign up logic
adds helper method to assist with sessions
creates two partials
divs for sign in/sign out
adds new routes for signing up, signing in
creates ajax calls and listeners for create account, sign in and sign out buttons
sign out button needs a fix
slight css modification, adds conditional for index page to display sign in/out html
slight refactoring
Merge pull request #2 from vabacumov/authentication

Authentication