Closure: Fixed rendering of completed items

Class name is now set in the template rather than at the view layer, because
todomvc.view.ToDoItemControlRenderer#setState is called on the old element
before it's removed from the DOM, so modifications don't persist.
Closure: Updated compiled JavaScript, version reference
Merge pull request #416 from passy/closure-strike-fix

Closure app doesn't apply 'completed' class to items