added: DXF Loader from 1.8
add the rotation for the DXFInsert, remove the rotation unsupported comment
add the LWPolyline, Arc, Header, but not Spline yet
correct the Insert entity when extrusion direction is (0,0,-1)
add the Hatch line geometry, left to find the color and convert from line to face
test the point color instead of material
test new material, overwritten by the material group
fixed: compile errors