Update model.md

Sounds good
On Aug 15, 2014 2:56 AM, "Lipis" <notifications@github.com> wrote:

> In main/templates/tutorial/model.md:
>
> > @@ -1,4 +1,5 @@
> >  As we are building a personal phonebook, we'll need to add the contact list.
> > +We are going to use a database structure for that.
>
> What about something like this?
>
> *As we are building a personal phonebook, we are going to need to store
> the contact list in a datastore.*
>
> —
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> <https://github.com/gae-init/gae-init-docs/pull/76/files#r16282045>.
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