Added simpleqml project demonstrating QML in ActiveQt

Added a new ActiveQt example application. The application demonstrates
the use of QML inside an ActiveQt control, running in-process.

Change-Id: I47582cf7eda665ef70f8feccdb6ed1f9e126ab30
Reviewed-by: Fredrik Orderud <forderud@gmail.com>
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>