Add default iptables to allow forward traffic from and to pod cidr. Previously Kilo expected the default behaviour of the forward chain to accept packets, which can not be guaranteed.
Allow nodes to have no private IPs. Nodes without private IPs will automatically be put into their own location.
This commit enables the compilation of kgctl when GOOS!=linux. This fixes #56. Signed-off-by: Lucas Servén Marín <lserven@gmail.com>