Update copyright year of debian meta file

Author: jslee02

debian/copyright

@@ -3,7 +3,7 @@ Upstream-Name: DART
 Source: http://github.com/dartsim/dart
 
 Files: *
-Copyright: Copyright 2008-2014 Georgia Tech Research Corporation
+Copyright: Copyright 2008-2015 Georgia Tech Research Corporation
 License: BSD-2-clause
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions