Copyright: bump the year

Change-Id: I73f45c8b7fe5efb9597826b96cc11d2dbfd72156

Copyright: bump the year
1f32a46a · Ben Boeckel · 3aeccaee · 1f32a46a
Commit 1f32a46a authored 10 years ago by Ben Boeckel
--- a/Copyright.txt
+++ b/Copyright.txt
@@ -3,7 +3,7 @@
  Program:   Visualization Toolkit
  Module:    Copyright.txt

-Copyright (c) 1993-2008 Ken Martin, Will Schroeder, Bill Lorensen
+Copyright (c) 1993-2015 Ken Martin, Will Schroeder, Bill Lorensen
 All rights reserved.

 Redistribution and use in source and binary forms, with or without