Make TFSession.FromSavedModel static. (migueldeicaza#377)

Author: dsherret

TensorFlowSharp/Tensorflow.cs

@@ -2725,7 +2725,7 @@ public IEnumerable<DeviceAttributes> ListDevices(TFStatus status = null)
 		/// here: https://github.com/tensorflow/tensorflow/blob/master/tensorflow/python/saved_model/README.md
 		/// </para>
 		/// </remarks>
-		public TFSession FromSavedModel (TFSessionOptions sessionOptions, TFBuffer runOptions, string exportDir, string [] tags, TFGraph graph, TFBuffer metaGraphDef, TFStatus status = null)
+		public static TFSession FromSavedModel (TFSessionOptions sessionOptions, TFBuffer runOptions, string exportDir, string [] tags, TFGraph graph, TFBuffer metaGraphDef, TFStatus status = null)
 		{
 			if (graph == null)
 				throw new ArgumentNullException (nameof (graph));