Added explicit support for BSPlineCurve to isHorizontal/isVertical.
Added explicit support for BSPlineCurve to isHorizontal/isVertical.

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