* Adds llMoveToTarget and llStopMoveToTarget support to the ODEPlugin.

* It doesn't generate at_target events, because they don't exist yet in the script engine.
* The Tau is different, however, compatible with scripts I tested.
* Not perfect...  but pretty good.

OpenSim/Region/Physics/BasicPhysicsPlugin/BasicPhysicsPlugin.cs

@@ -390,5 +390,8 @@ namespace OpenSim.Region.Physics.BasicPhysicsPlugin
         public override void CrossingFailure()
         {
         }
+        public override PhysicsVector PIDTarget { set { return; } }
+        public override bool PIDActive { set { return; } }
+        public override float PIDTau { set { return; } }
     }
 }