Don't build NOX and OVS as root.  Also don't nuke kernel src.  Install
newer autoconf needed for OVS install from Deb backports, not src.

'unpep8' script, which does most of the work.

- topo.py is still in pep8
- not all examples work, but this is due to other issues

does most of the work.)

topo.py is still in pep8, however