added sessions routes
fixed question vs. questions typo in route
created basic home page with questions in list form
rebased questions controller to bring in user authentication for questions pages
added form partial for creating a new question
created empty page for individual questions
fixed two route typos, question vs. questions and resource :users vs. resources :users
added page authentication for questions for current users only
wrote questions model with associations and validations
setup test view for questions index
questions model and controller with basic functionality