add the starport active animation

OpenRA.Game/Traits/TraitsInterfaces.cs

@@ -74,6 +74,7 @@ namespace OpenRA.Traits
 	public interface INotifyBuildComplete { void BuildingComplete(Actor self); }
 	public interface INotifyBuildingPlaced { void BuildingPlaced(Actor self); }
 	public interface INotifyProduction { void UnitProduced(Actor self, Actor other, CPos exit); }
+	public interface INotifyDelivery { void IncomingDelivery(Actor self); void Delivered(Actor self); }
 	public interface INotifyOwnerChanged { void OnOwnerChanged(Actor self, Player oldOwner, Player newOwner); }
 	public interface INotifyCapture { void OnCapture(Actor self, Actor captor, Player oldOwner, Player newOwner); }
 	public interface INotifyHarvest { void Harvested(Actor self, ResourceType resource); }