Plumb the connection though from llSetVehicleVectorParam

to the various physics engines. No connection to the 
underlying physics simulator yet, just plumbing through
the various classes.

OpenSim/Region/Physics/BasicPhysicsPlugin/BasicPhysicsPlugin.cs

@@ -335,12 +335,16 @@ namespace OpenSim.Region.Physics.BasicPhysicsPlugin
             set { return; }
         }
 
-        public override float VehicleFloatParam
+        public override void VehicleFloatParam(int param, float value)
         {
-            get { return 0f; }
-            set { return; }
+
         }
-        
+
+        public override void VehicleVectorParam(int param, PhysicsVector value)
+        {
+
+        }
+
         public override PhysicsVector CenterOfMass
         {
             get { return PhysicsVector.Zero; }