Add: Copyright messages.

main.nut

@@ -1,3 +1,21 @@
+/*
+ * This file is part of BusyBee, which is a GameScript for OpenTTD
+ * Copyright (C) 2014-2015  alberth / andythenorth
+ *
+ * BusyBee 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; version 2 of the License
+ *
+ * BusyBee 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 BusyBee; If not, see <http://www.gnu.org/licenses/> or
+ * write to the Free Software Foundation, Inc., 51 Franklin Street,
+ * Fifth Floor, Boston, MA 02110-1301 USA.
+ */
 
 require("company.nut");