added groundwork for shell animation

Projekte/battleship/converter/src/main/java/pp/battleship/exporter/ModelExporter.java

@@ -45,6 +45,7 @@ public class ModelExporter extends SimpleApplication {
         export("Models/BoatSmall/12219_boat_v2_L2.obj", "12219_boat_v2_L2.j3o");
         export("Models/Battle/14084_WWII_Ship_German_Type_II_U-boat_v2_L1.obj", "Battle.j3o"); //NON-NLS
         export("Models/CV/essex_scb-125_generic.obj", "CV.j3o"); //NON-NLS
+        export("Models/Shell/Shell/45.obj", "Shell.j3o");