add size option for gravatar
add tests for flash messages
change flash layout code to use the content_for tag
users are now presented with a login page
users signing in with an invalid email/password combination will get an error messsage
flash message does not persist when going to another page
users are now provided with a different menu depending upon whether or not they are logged in
add user signup test with valid information and fixtures, tests not passing
tests passing
add a logout method to the Seessions Controller
tests for logout passing
users are not remembered when they are logged in
users can logout from a persistent session and can be forgotten
users now have the option to be 'remembered' with a checkbox upon login
update Gemfile
add tests for remember capability, one test not passing
all integration tests passing, for some reason full_title helper test is not...
all tests in the green, chapter finished
Merge branch 'feature/log-in-log-out' into develop
Finished Chapter 8, all tests passing.