+ extend number protocol
+ extend number protocol
+ extend number protocol
+ fixes #0001409: implement FreeCAD.Units.Quantity().__float__()
+ fixes #0001413: Part.Shape.transformGeometry on Null Shape causes SIGSEGV
+ fixes #0001410: Base::Quantity::getValueAs does not properly check the dimension
OpenSCAD Module: Adds support for Frustum and fixes minor bugs