Re: Coordinate spaces in SVG and CSS

I've committed a first draft of the View Boxes section to the dev copy
of CSS3 Images.  This needs some revision, and I think it may be a
good idea to expand this into a more complete description of how
background images are handled in CSS.

Any feedback is appreciated, particularly if what I have specified is
somehow inaccurate.  I'd also like to know just what CSS's behavior is
for an image with an intrinsic width but not an intrinsic height (or
vice versa).

~TJ