created Sessoin controller, authentication_pages request spec
write specs for authentication page
add sessions routes
edited guard file, created signin view (new session)
add remember token to user model, add remember_tokn column and index to db migration
add sign_in(user) method as helper to session controller
include SessionsHelper module in application_controller
add current_user accessor methods to SessionsHelper
add signed_in? method ot SessionsHelper
correct typo in application.js, add sign_in & redirect_to user methods to session#create, modify application nav bar to include new menu for signed in users
fix typo in authentication_pages_spec
create ability for users to sign out
refactored request specs by adding implementation-specific details to custom matchers and methods in spec/support/utitlies.rb