Network setup for hotplug wlan

with routing!
New robot startup system

start from rc.local now since no displays present
Partially revert "Network setup for hotplug wlan"

This partially reverts commit 6b66f155b23a150ca4c8c3230b9e30bd82695df6.
I did not mean to delete interface.sh.
Latest try at network setup

This one seems to work well. sr1 creates an ad-hoc network, sr2 routes trhough
sr1 when needed.
Increase number of open files limit

ros needs lots of open files
Add robot to sudo
Must have some vim
Add navigaiton stack packages