add test for user edit page and add user edit view
add test helper to sign users in and make settings link work
fix error in test for settings link
change user update action and add test for update action
have user sign in before editing and updating information
test that the edit and update actions require the right user
add correct_user before action to protect the edit/update pages
implement current_user? method
implement friendly forwarding
create users index page
populate db with 100 sample users
paginate users in index action and refactor rendering of user index with partial
migration to add boolean admin attribute to users table
make the first sample user an admin
allow for admin to delete users