polymorphism for UnaryFunction0D, Interface0D, Interface1D. Add to change UnaryFunction1D<void> to static UnaryFunction1D_void. Resolved namespace collision on the Image class (changed to FrsImage). There is greater support for style modules but somehow, some do not show anything yet (japanese_bigbrush being an example).
subclasses and Curvature2DAngleF1D. Understood that Curve and Noise classes cannot be defined in Freestyle's API because they are already given by Blender's API. Will rename to FrsCurve and FrsNoise and change the corresponding style modules.