Automatic merge of T1.5.1-442-gbaefb6b08 and 10 pull requests

- Pull request #570 at 7269d24: Experimental glTF 2.0 support with PBR lighting
- Pull request #757 at d9d75f4: Unify RailDriver code implementations
- Pull request #799 at dc03850: Consolidated wind simulation
- Pull request #821 at e0fa5a8: Adds suppression of safety valves
- Pull request #829 at 434af02: Improvements for air brakes #3 - Emergency valves
- Pull request #830 at e30b900: Electric locomotive hot start
- Pull request #835 at e632edb: Correct Brake Shoe Force Calculation
- Pull request #839 at d00beb9: First phase of https://blueprints.launchpad.net/or/+spec/additional-cruise-control-parameters
- Pull request #840 at daca020: Bug fix for sanding max speed not working
- Pull request #842 at a4a5592: Set up ability for steam locomotives to have multiple engines

Source/Orts.Simulation/Simulation/RollingStocks/SubSystems/PowerSupplies/BatterySwitch.cs

@@ -343,7 +343,7 @@ public virtual void HandleEvent(PowerSupplyEvent evt)
                     {
                         case ModeType.Switch:
                             CommandSwitch = false;
-                            Wagon.SignalEvent(Event.BatterySwitchCommandOn);
+                            Wagon.SignalEvent(Event.BatterySwitchCommandOff);
                             break;
                         case ModeType.PushButtons:
                             CommandButtonOff = true;