update for year 2018

Author: jmckenna

README

@@ -67,7 +67,7 @@ License
 
 ::
 
-  Copyright (c) 2008-2017 Open Source Geospatial Foundation.
+  Copyright (c) 2008-2018 Open Source Geospatial Foundation.
   Copyright (c) 1996-2008 Regents of the University of Minnesota.
 
   Permission is hereby granted, free of charge, to any person obtaining a copy