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.