add sessions controller scaffold
add integration tests for auth pages
add signin page spec
add signin and signout routes
add signin view
fix typos
Add spec for signin page for valid/invalid info specified
add signin form
add signin link to header
add case when user clicks another link after unsuccessful authorization
add invalid email/password case
add remember_token respond_to spec
add remember_token migration
add non blank spec on user save
fix typo
User#create_remember_token
Add SessionHelper module to support sign_in and stuff
Add bootstrap js to application.js
Add SessionHelper to ApplicationController
Add current_user functionality to SessionHelper module
Add different layout links to navigation bar for signed in user and unathorized one
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add after sign up case in spec
tidy up user mode code
add SessionHelper#sign_out
add SessionsController#destroy
add sign in on sign up