Function writeShape

Write the object's shape contents in the given DXF object. Iterates over the wires (polylines) and lone edges of `sh`. Then it creates DXF object depending of the type of wire, and adds those objects to the `dxfobject` list. If the wire only has one edge and it is of type `'Circle'

(sh, ob, dxfobject, nospline=False, lwPoly=False,
               layer=None, color=None, asis=False)