added the mixing particle filter model with all is might and failures :)

code/filter/Structs.h

@@ -108,6 +108,8 @@ struct MyNode : public GridPoint, public GridNode, public GridNodeImportance, pu
     /** ctor */
     MyNode(const int x, const int y, const int z) : GridPoint(x,y,z) {;}
 
+    MyNode(const GridPoint point) : GridPoint(point.x_cm, point.y_cm, point.z_cm) {;}
+
     static void staticDeserialize(std::istream& inp) {
         WiFiGridNode::staticDeserialize(inp);
     }