1st set of upgrades
added previous button functionality and score tracking updates
restructuring functions and adding all html elements dynamically with js
added fade in and out of question and answers, added previous button functionality
added login/signup form
add selected answer checked on previous question click
styling login/sign-up form and adding in initial functionality
added display user name on sign up
get user login and error messaging working
added cookie function
fix CookieUtil object
get cookie working
added answer validation
merge upgrade into master