GooCanvasImage represents an image item.
<note><para> It is usually necessary to set the "scale-to-fit" property to true to scale the image to fit the given rectangle. </para></note>
It is a subclass of CanvasItemSimple and so inherits all of the style properties such as "operator" and "pointer-events".
It also implements the CanvasItem interface, so you can use the CanvasItem functions such as raise and rotate.
To create a CanvasImage use create.
To get or set the properties of an existing CanvasImage, use @get and @set.