Added Debian packaging.

debian/copyright

@@ -0,0 +1,20 @@
+Ruby Netlink
+============
+
+Copyright (c) 2011 Bytemark Computer Consulting Ltd
+
+Licence:
+
+This program 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.
+
+This program 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.
+
+On Debian GNU/Linux systems, the complete text of the GNU General Public
+License can be found in ‘/usr/share/common-licenses/GPL’ or in the dpkg
+source as the file ‘COPYING’