refactored top navbar code into _top_navbar.html.erb partial
add integration spec folder and begin work on user_login integration spec
renamed integration spec folder to features and improved upon user login test
deletes unnecessary test folders
removed unnecessary test folder and readme, and added functionality to allow users to login/logout, and guests to signup
enhaced navbar styling
Merge pull request #15 from rickarubio/rr-users-can-login

Users can login/logout and Guests can signup. Navbar styling improved.
hiding course inputs
added updated application.css