enable Shorewall for firewall usage
also resolves issue #37
correct tcp<>udp
allow ICMP4/6-ping
remove ip6table invalid package
enable Shorewall firewall on bootup
Merge branch 'develop' into feature-wheezy

Conflicts:
	config.v3/includes.chroot/etc/init.d/iptables-persistent
	config.v3/includes.chroot/etc/iptables/iptables.conf
	config.v3/includes.chroot/etc/iptables/rules
	config.v3/includes.chroot/etc/iptables/rules6
remove old ipv4 fw rules