Added methods to directly access the horizontal / vertical radius of an ellipse.
Inversion of rotation small change in _setPointOfEllipseAtAngle() method.
Modification of includePoint() method to work with qreal instead of int (also overloaded for QPointF).
Override of includesPoint() methods in Ellipse.
Added center control point (basic functionality, just "stays inside" the ellipse for now but not working 100%)
Add control center.
Use QTransform to manage point remapping when moving vertices.
Clip center control point inside ellipse using QTransform.