create user controller/routes
finish user model
move header to partial, show params with debug
add users resourse and user#show action
add user signup
add sessions
add signin page
get sessions working
add sign out
style sign in/out pages
add profile updates
change some html/css class names
add profile to header bar
add admin to users, and ability to delete users, and style user index
remove user index link for non-signed-in users