First draft of cloneable CALayer, needed for some features we want to add to SVGKit later
Renamed illegally-named SVGLayered protocol to ConverterSVGToCALayer, in preparation for removing the non-Spec methods from the Spec-defined classes. Deleted the long unused SVGKImage+SVGPathView category (if/when we're ready to pull this back in to SVGKImage, can pull it from the old git commits)
Merge branch '1.1.0' into adding-cloneable-calayers
FIXED: SVG <g> elements now layout their CALayer output correctly (fixes a long-running bug introduced because we didn't understand how the original code from 2010 was intended to work, and got it wrong. I've added extensive code docs to make it clearer for future maintainers)
ADDED: detailed note in source code docs on the CALayer export process w.r.t. laying out sublayers