Linux script to get most expensive processes

[Laura Creighton]

If you are running this script with Python 2 write:

   if sys.platform.startswith('linux'):

to handle the case where you get linux or linux2 (and a few other weird
things some embedded systems give you ...)

Right now I think every linux system returns linux for Python 3, so it
is less of an issue (now, anyway).

Laura