Arch: fix in new ifc-importer
Draft: Fixed small regression in Draft2Sketch
improvements to exportDRAWEXE

load only MODELING module instead of ALL
use angel of revolution for cones
improve sweep output
support for point, vertex
cache object names to reuse them in DRAWEXE
do not expode spine which are allready edges
don't try to make faces from arcs (if this failed in FreeCAD allready)
use rounded floats if they safe digits

Sometimes the floats seems to be rounded to twelve decimal
places. we round them if it allows so safe digigts.
round angles