add size option to gravatar
add tests for error messages
add test for after saving user
add content tag
generate sessions controller, add signup, signout routes
add methods and view
add tests for signin
add test for invalid signin
include Sessions helper in controllers
generate migration to add remember_token to users
add remember_token to table
add remember_token tests and creation
set up and save token function in sessions helper
add bootstrap javascript library
add check if user is signed in
add what shows when signed in or not
fix test typos
move signout test to after signin
add bootstrap, previous commit had error
add remove token when signout