OK, so that's great progress for now. We can now add todo items to our app, and the state of the data is tracked using our service. Next we'll move on to getting our footer functionality working, including the todo counter, and look at conditional rendering, including correctly styling todos when they've been checked. We'll also wire up our "Clear completed" button....extremely beneficial, as Ember makes heavy use of them. Objective:...the interactivity we need to make the app functional. When beginning...