Draft: DraftVecUtils.py clean up imports and messages
Draft: DraftVecUtils.py clean up imports and messages

Small spacing fixes like imports in separate lines
for more clarity, and the position of the license.
Also use the new `messages` module to provide the functions
to print text to the console.
Also use `Matrix` prefixed by the `FreeCAD` module.

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master