3.0 - WIP - Added accessor method getView() to ViewVarsTrait.

Let me know if this seems worth pursing.

`AppView` allows setting defaults and then in controller you would use `$this->getView()->foo` to modify stuff as needed. `Controller::$helpers` and similar view related properties would be gone.
Nope there isn't similar code anywhere else. Currently controller and cell just do `$this->View = $this->createView();`