CAD Interoperability Badge

1. Ability to port fully including retaining naming and using batch processes between SweetHome3D, FreeCAD, Blender, KiCAD, and OpenSCAD
2. Ability to move between STL, STEP, fcstd, sh3d, iges, OBJ.
3. Ability to render FreeCAD-generated files in SweetHome3D
4. Rendering FreeCAD and SweetHome3D in Blender
5. Importing terrain into FreeCAD and Blender