version 0.26
_get_memory() uses the resource module from std lib.
Clean management of global variables. Added a bunch of tests
cosmetic.
cosmetic.
FIX: PID for ps
Correct units (for linux)

Not sure this should be the same on OSX ...
optional variable $PYTHON in makefile
Add file README_DEV
Set version to 0.26-git
Cleanup
using xrange in python2
using while
Merge pull request #45 from s7v7nislands/using_xrange

don't use range in python2
Update README.rst
Update README.rst