fourBoxWipe, ellipseWipe, pinWheelWipe).
Ported or implemented the following classes or functions:
ClippedSlideChange, PathTools.normalizePath, ClippingFunctor,
createClipPolyPolygon, BarWipePath, FourBoxWipePath,
PathTools.createPathFromEllipse, EllipseWipePath, PinWheelWipePath.
Extended the following SVG DOM classes: SVGMatrix, SVGPathElement,
SVGPathSegMovetoAbs, SVGPathSegLinetoAbs, SVGPathSegCurvetoQuadraticAbs,
SVGPathSegCurvetoCubicAbs.
Modified and added new methods to: MetaDocument, AnimatedSlide,
SlideTransition, TransitionInfoTable.
