Add correct copyright information

src/agg_lcd_distribution_lut.h

@@ -1,25 +1,18 @@
+// Adapted by Francesco Abbate for GSL Shell
+// Original code's copyright below.
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
 //----------------------------------------------------------------------------
-// Anti-Grain Geometry (AGG) - Version 2.5
-// A high quality rendering engine for C++
-// Copyright (C) 2002-2006 Maxim Shemanarev
 // Contact: mcseem@antigrain.com
 //          mcseemagg@yahoo.com
-//          http://antigrain.com
-// 
-// AGG is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License
-// as published by the Free Software Foundation; either version 2
-// of the License, or (at your option) any later version.
-// 
-// AGG is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-// 
-// You should have received a copy of the GNU General Public License
-// along with AGG; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
-// MA 02110-1301, USA.
+//          http://www.antigrain.com
 //----------------------------------------------------------------------------
 
 #ifndef AGG_LCD_DISTRIBUTION_LUT_INCLUDED