Patch for RFC1918 mesh and AP addresses

Changed 2.install script  to change IP adresss ranges in network config, then change MAC in wireless config. 

I haven't checked that this works on an MR3020, or with the SSH bootstrapping process. 
The elements of the script have all been tested on openwrt. 
The most sketchy step is the way I pull the mac address from the openwrt over SSH. If there's been a problem loading wireless modules, this will die silently. 

Keep the serial cable handy.