locking down psutil for now, 2.0 release will break the current code
Moving over to function based total ram/swap.  psutil has moved this direction already.
Moving over to function based total ram/swap/cpus.  psutil has moved this direction already.
adding TODO
json was introduced *in* 2.6
with Python 2.5 support dropped, simplejson is not longer requred
readding unittest2 (typo)