Implemented slew to target

MeadeAutostar497/AscomClasses/Telescope.cs

@@ -804,14 +804,14 @@ namespace ASCOM.MeadeAutostar497
 
         public void SlewToTarget()
         {
-            tl.LogMessage("SlewToTarget", "Not implemented");
+            tl.LogMessage("SlewToTarget", "Executing");
-            throw new ASCOM.MethodNotImplementedException("SlewToTarget");
+            _telescopeController.SlewToTarget();
         }
 
         public void SlewToTargetAsync()
         {
-            tl.LogMessage("SlewToTargetAsync", "Not implemented");
+            tl.LogMessage("SlewToTargetAsync", "Executing");
-            throw new ASCOM.MethodNotImplementedException("SlewToTargetAsync");
+            _telescopeController.SlewToTargetAsync();
         }
 
         public bool Slewing

MeadeAutostar497/Controller/ITelescopeController.cs

@@ -28,5 +28,7 @@ namespace ASCOM.MeadeAutostar497.Controller
         void SlewToAltAz(double azimuth, double altitude);
         void SlewToAltAzAsync(double azimuth, double altitude);
         void SyncToTarget();
+        void SlewToTarget();
+        void SlewToTargetAsync();
     }
 }

MeadeAutostar497/Controller/TelescopeController.cs

@@ -633,6 +633,24 @@ namespace ASCOM.MeadeAutostar497.Controller
                 throw new ASCOM.InvalidOperationException("Unable to perform sync");
         }
 
+        public void SlewToTarget()
+        {
+            SlewToTargetAsync();
+
+            while (Slewing)
+            {
+                Util.WaitForMilliseconds(200);
+            }
+        }
+
+        public void SlewToTargetAsync()
+        {
+            if (TargetDeclination == INVALID_PARAMETER || TargetRightAscension == INVALID_PARAMETER )
+                throw new ASCOM.InvalidOperationException("No target selected to slew to.");
+
+            DoSlewAsync(true);
+        }
+
         //todo remove the polar parameter and split method into two.
         private void DoSlewAsync( bool polar) 
         {