Comment 11 for bug 625140

Done:
* Shapes and Path.
* Transforms (matrix, rotation, translation, scale).
* Flat colors for fill and strokes.
* Fill rules.
* Layers and groups.
* Strokes linecap, linejoin, mitterlimit.

Todo:
* Gradient fill (good progress).
* Pattern fill (not started).
* Clip and mask (not started).

I don't plan to work on filters (or maybe only on basic blurs).
Some elements or attributes doesn't seem to exist in FXG (stroke dasharray and dashoffset, defs -library is a very different concept).