Copyright update

COPYING

@@ -290,8 +290,8 @@ to attach them to the start of each source file to most effectively
 convey the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
 
-    Xfce panel plugin for indicator-applet
-    Copyright (C) 2009  Mark Trompell
+    Xfce panel plugin for Pulseaudio mixer control
+    Copyright (C) 2014-2015  Andrzej
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by