Added copyright notice

oliversalzburg · oliversalzburg · commit 798344779d3a · 2013-05-21T20:39:28.000+02:00
diff --git a/Graph/Items/NodeNumericSliderItem.cs b/Graph/Items/NodeNumericSliderItem.cs
@@ -1,5 +1,5 @@
 ﻿#region License
-// Copyright (c) 2009 Sander van Rossen
+// Copyright (c) 2009 Sander van Rossen, 2013 Oliver Salzburg
 // 
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
