add validation and association testing for line, stop and station models
capybara testing 'create_new_station' setup
create user table in database
create routes, models(ex:sessions), new.htmlerb, and controllers for USERS and SESSIONS.
create 'destroy' method and link so that user can log out.
create better routes for signup, login, and logout links.
modify UserController create action and setting the user_id session variable when the new user is saved
create basic authorization to only allow admins to create, edit, or destroy stations.
add utilities.rb for spec files. Added login_page_spec. Modified creating new station specs to accomidate admins and non admins
fixed specs for creating new station for admin and non admin