Base: add Python number protocol support to Placement/Rotation

src/Base/PlacementPy.xml

@@ -10,6 +10,7 @@
 		Namespace="Base" 
 		Constructor="true"
         Delete="true"
+		NumberProtocol="true"
         RichCompare="true"
 		FatherNamespace="Base">
 	<Documentation>
@@ -118,5 +119,11 @@ Placement(Base, Axis, Angle) -- define position and rotation
 			</Documentation>
 			<Parameter Name="Matrix" Type="Object" />
 		</Attribute>
+        <ClassDeclarations>public:
+            PlacementPy(const Placement &amp; pla, PyTypeObject *T = &amp;Type)
+            :PyObjectBase(new Placement(pla),T){}
+            Placement value() const
+            { return *(getPlacementPtr()); }
+        </ClassDeclarations>
 	</PythonExport>
 </GenerateModel>