~ README file added

README

+Free use of this software is granted under the terms of the GNU
+General Public License (GPLv3).
+Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.
+
+The source is available at: http://gitlab.vahanus.net/3ronco/ipturntables  
+Any help is appreciated, please feel free to report issues or contribute
+patches,
+
+Written by Branko Mikić <mikic@vahanus.net>
+Copyright (C) 2014, 2015, 2016 Branko Mikić.
+
+ipturntables.sh is a bash script for creating an iptables firewall
+for either IPv4 and/or IPv6 protocols. It's just a bash script depending
+on procfs, sysfs and iptables, ip commands.
+
+Often a functionality of allowing and filtering packets spans multiple
+chains and can not be limited to a single rule therefore this script's
+approach is to combine (not necessarily multiple) rules into an easy
+understandable, comprehensive name. Maybe it can be called an abstract
+iptables function or call. A full firewall is then assembled by a set
+of these calls like:
+
+./ipturntables.sh -4 RESET BASE_RULE_SET \
+	ALLOW_SERVICE_DISCOVERY eth0 \
+	ALLOW_SUBNETS eth0 \
+	FORWARD_SUBNET_PROTECTIVE 192.168.0.0/16 ppp0 \
+	POSTROUTING_MASQUERADE 192.168.0.0/16 ppp0
+
+A new static base firewall setup can be created by simply calling make in
+the source folder but be aware that once ipturntables.sh is started it
+utilizes iptables immediately, meaning it changes the firewall rules of
+the host it has been run on. (YOU HAVE BEEN WARNED!)
+If you don't intend to use it but wanna see what it does an appropriate
+environment is recommended eg. a VM to avoid interference with your running
+setup. For a detailed manual page see the ipturntables.8 file.