user can visit sign in page, tested
user is redirected after signed in, tested
sign out, tested
redirects to profile page if user still logged, tested
raise error if passord confirm do not match, tested
added layout.erb and some refactoring
sign in error if user name do not exist, tested
sign in error if password do not match, tested
added User to chit_feature_spec
posting a chit, tested
added readme.md file