Add Object3D._tesselate() method.
Automatically tesselate objects with tolerance of 0.05mm before
outputting as STL.
Do a 45-degree twist when linear extrude twist is on.
Split creation of specific linear extrusion objects into submethods.
Perform correct twist angle.
Add isInnerWireOfFace() helper function.
Fix spacing in LinearExtrusion.__init__.
Refactor LinearExtrusion._makeTwisted() into separate face
and wire methods.
Iterate over faces before twisting. (Still, only 1 face is supported.)
Iterate over wires in face before twisting, and sort them into
outer and inner wires. (Still, only 1 wire is supported atm.)
Support twisting multiple faces.
Refactor implementation of Combination into a public makeShape() method.
New makeShape() method now accepts TopoDS_Shapes instead of Object3Ds.
Support (slowly) twisting faces with holes.