Copyright year fix.

commands/welcome.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8  -*-
 #
-# Copyright (C) 2009-2014 Ben Kurtovic <ben.kurtovic@gmail.com>
+# Copyright (C) 2009-2015 Ben Kurtovic <ben.kurtovic@gmail.com>
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal