Image.h patch for ImageMagick.NET to add some properties

Index: Image.h
===================================================================
--- Image.h (revision 91402)
+++ Image.h (working copy)
@@ -531,7 +531,31 @@
            }
        }

+       property double MeanErrorPerPixel
+       {
+           double get()
+           {
+               return image->meanErrorPerPixel();
+           }
+       }

+       property double NormalizedMaxError
+       {
+           double get()
+           {
+               return image->normalizedMaxError();
+           }
+       }
+
+       property double NormalizedMeanError
+       {
+           double get()
+           {
+               return image->normalizedMeanError();
+           }
+       }
+
+
        //----------------------------------------------------------------
        // IO
        //----------------------------------------------------------------