add user edit option, settings link in drop-down

section 9.1 page 384
add authorization for user edit/update

page 390
require right user

page 392
add friendly forwarding for user authorization

page 396
add index page to list all users

page 403
add rake task to populate database with fake users

page 404
paginate users index

page 410
refactor pagination using render

page 412
add admin attribute

page 417
add destroy fuction for users

page 422
Merge pull request #9 from bhouse/updating-users

Finish user edit, update, index, & destroy actions