Finished allowing users to update their profiles.
Finished up Authorization for updating profile
Finished authorizing current_user to update/edit own profile
Finished up forwarding on the users pages.
Added an index for all users at '/users', only viewable if you're
logged into the site. If you're not logged into the site, will redirect
to the sign in page.
Added pagination feature for the '/users' page.
Refactored code
Added the ability for creating admins
Finish user edit, update, index, and destroy actions

End of chapter 9!