Added UC-CNC postprocessor script.
Added UC-CNC script to the build specifications.
Merge branch 'uccnc_postprocessor' of https://github.com/papaathome/FreeCAD into uccnc_postprocessor
Included bugfix as in FreeCAD PR. #4673 'Fix proxy error bug that occurs when postprocessing' (review recommendation)
Merge branch 'uccnc_postprocessor' of https://github.com/papaathome/FreeCAD into uccnc_postprocessor
Aplied Flake8 formatting and removed redundant global declarations.
HexMandala v1.4b changes.