Fixxed issue -> HorizontalAlingment and VerticalAlignment were hard coded to Left and Top - it is Center for both as default - which could be changed by changing HorizontalAlingment and VerticalAlignemnt on contrl.
Fixed bug - Horizontal/Vertical Alingment wasn't respected. Changed ScrollViewer zooming to UpdatedLayout event - in some cases "zoom" could be interrupted and stopped.
Changed sample CroppableImage horizontal and vertical alingment to center.