* Added PhysicsScene.Dispose()

* In ODE, disposing of all of the ODE objects and the ODE World to reclaim memory when the simulator restarts.

OpenSim/Region/Physics/Manager/PhysicsScene.cs

@@ -81,6 +81,8 @@ namespace OpenSim.Region.Physics.Manager
 
         public abstract void DeleteTerrain();
 
+        public abstract void Dispose();
+
         public abstract bool IsThreaded { get; }
 
         private class NullPhysicsScene : PhysicsScene
@@ -157,6 +159,10 @@ namespace OpenSim.Region.Physics.Manager
             {
                 get { return false; }
             }
+            public override void Dispose()
+            {
+
+            }
         }
     }
 }