add answer migration
added log to gitignore
add views for question edit and question show
added show, edit, update, destroy methods to question controller
show all questions on root index page
add associations for user questions and answers

user has many questions and answers
add session controller and view for user login
add logout link to navbar
list questions on root path
add current_user helper to application controller
include helper method for user login
setup current user helper method
set session id and clear session id for user login and logout
add current user helper method to determine which links to show
creates questions associated to a user
display user's name next to their question on root page
add link for users to see their questions on user profile page
add custom route for users_questions
add user_questions_controller with #index
add view for user questions #index