update ReadME, as well as some extra stuff for setting up functionality

src/main/java/net/halbear/hvf/Util/VehicleData/FuelType.java

@@ -0,0 +1,11 @@
+package net.halbear.hvf.Util.VehicleData;
+
+public enum FuelType {
+    FossilFuelsIncludingWood,
+    FossilFuelsExcludingWood,
+    Kerosene,
+    AviationPetrol,
+    Diesel,
+    Petrol,
+    SolidPropellant
+}

src/main/java/net/halbear/hvf/Util/VehicleData/PhysicsPreset.java

@@ -1,4 +1,4 @@
-package net.halbear.hvf.Entity.Renderer;
+package net.halbear.hvf.Util.VehicleData;
 
 public enum PhysicsPreset {
     SimpleMinecraft,

src/main/java/net/halbear/hvf/Util/VehicleData/VehicleBuildInfo.java

@@ -11,6 +11,7 @@ public class VehicleBuildInfo {
     private Vector3d CentreOfMassOffset = new Vector3d(0,0,0);
     private int EngineCount;
     private EngineCategories EngineType;
+    private FuelType FuelType;
     private int GasCelCount;
     private float MaxSpeedMS;
     private float MaxEngineRPM;
@@ -20,10 +21,19 @@ public class VehicleBuildInfo {
     private boolean AdheresToGravity = true;
     private Vector3d PilotSeat;
     private List<Vector3d> PassengerSeats = new ArrayList<>();
+    private List<Float> FuelTanks = new ArrayList<>();
 
     public VehicleBuildInfo AddPassengerSeat(Vector3d SeatIn){
         PassengerSeats.add(SeatIn);
-        return  this;
+        return this;
+    }
+    public VehicleBuildInfo AddFuelTank(Float CapacityLitres){
+        FuelTanks.add(CapacityLitres);
+        return this;
+    }
+    public VehicleBuildInfo SetFuelType(FuelType fuelType){
+        this.FuelType = fuelType;
+        return this;
     }
     public VehicleBuildInfo SetPilotSeat(Vector3d SeatIn){
         PilotSeat = SeatIn;
@@ -90,6 +100,8 @@ public class VehicleBuildInfo {
     public double GetGravityStrength(){return Gravity;}
     public Vector3d GetPilotSeat(){return PilotSeat;}
     public List<Vector3d> GetPassengerSeats(){return PassengerSeats;}
+    public List<Float> GetFuelTanks(){return FuelTanks;}
+    public FuelType GetFuelType(){return this.FuelType;}
     public float GetMaxSpeedMS(){return MaxSpeedMS;}
     public float GetMaxEngineRPM(){return MaxEngineRPM;}
     public float GetWingSpan(){return WingSpanMeters;}