build 190402. basic implementation for script generated vehicle destination sign textures

DynObj.h

@@ -205,6 +205,14 @@ public:
         bool has_light { false }; // the submodel was originally configured with self-illumination attribute
         material_handle destination { null_handle }; // most recently assigned non-blank destination texture
         material_handle destination_off { null_handle }; // blank destination sign
+        std::string script; // potential python script used to generate texture data
+        int update_rate { 0 }; // -1: per stop, 0: none, >0: fps // TBD, TODO: implement?
+        std::string instancing; // potential method to generate more than one texture per timetable
+        std::string parameters; // potential extra parameters supplied by mmd file
+    // methods
+        void deserialize( cParser &Input );
+    private:
+        bool deserialize_mapping( cParser &Input );
     } DestinationSign;
     float fShade; // zacienienie: 0:normalnie, -1:w ciemności, +1:dodatkowe światło (brak koloru?)
     float LoadOffset { 0.f };