Splitting SVG part of w3c/csswg-drafts#894

What part of the SVG spec needs to be cleared up?

• Somewhere it should state that the SVG root element is a CSS layout
  box for the purposes of transformations. Probably in the same place where
  we state that backgrounds, borders, and other properties apply on the root
  element.

• In the SVG view spec (linking chapter), it should state that an
  svgView transformation applies in the same way as a transformation on the
  root element.

• In the SVG view spec, it should clarify whether the transformation

  • is in addition to the transformation defined in the SVG file (e.g.,
    take whatever would normally be drawn, and transform it)
  • OR, a replacement for it, as if it was an !important style override
    (all the other svgView parameters override values specified in
    the SVG file)