Simplified the README example.

Instead of getting tricky with .tap, we should be keeping it simple.

    def update
      redirect_to current_account.people.find(params[:id]).tap { |person|
        person.update_attributes!(person_params)
      }
    end

That's the current README example. 

This can (and probably should) be simplified to

    def update
      person = current_account.people.find(params[:id])
      person.update(person_params)
      redirect_to person
    end


They do the exact same thing from what I can tell.

(thanks @steveklabnik for helping me figure this out)