Made the STEP import function more robust so that it could return a CQ.Workplane object.

cadquery/CQ.py

@@ -679,8 +679,8 @@ class CQ(object):
             startPt = obj.Center()
             endPt = startPt + endVec
             obj.rotate(startPt,endPt,angleDegrees)
-
-        return self.each(_rot,False)
+        
+        return self.each(_rot, False)
 
     def translate(self,vec):
         """