Access internet from private network

[wrought]

The default gw for the primary routing table should be the exit node like so:

route add default gw 10.42.0.99 br-openmesh 

When a dhcp lease is received on eth0 we need to somehow remove the exit node as a default route since we then want the ethernet to be a default route.

[max-b]

This has been addressed in the newest configuration.