Added RemoveAvatar() method to physics plugins, should be called on log out (needs doing) and when downgrading a client to a child-avatar (should be working)

OpenSim.Physics/OdePlugin/OdePlugin.cs

@@ -131,6 +131,11 @@ namespace OpenSim.Physics.OdePlugin
             return newAv;
         }
 
+        public override void RemoveAvatar(PhysicsActor actor)
+        {
+
+        }
+
         public override PhysicsActor AddPrim(PhysicsVector position, PhysicsVector size)
         {
             PhysicsVector pos = new PhysicsVector();