Fix copyright header in AnimationUtil

Change-Id: I768d93e8eb7f4b6415f17c80bc4564053313dc56

client/src/com/vaadin/client/AnimationUtil.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2013 Vaadin Ltd.
+ * Copyright 2000-2014 Vaadin Ltd.
  * 
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
  * use this file except in compliance with the License. You may obtain a copy of