Implement image's geometry properties
In SVG2, x/y/width/height
are now geometry properties instead of attributes.
See the implementation notes in #772 (closed) for the <rect>
element; the <image>
element can be done in a similar way. This time, Image::draw
directly has access to the values
; it can pull values.x().0
/etc. once the new properties are defined and available in the ComputedValues
.