* Some installation methods:

  python setup.py install

or, for an installation in the user Python library (no additional access
rights needed):

  python setup.py install --user

or, for an installation in a custom directory my_directory:

  python setup.py install --install-lib my_directory

or, if additional access rights are needed (Unix):

  sudo python setup.py install

* The tests programs (test_*.py) are meant to be run through the Nose
testing framework.  This can be achieved for instance with a command
like

  nosetests -sv uncertainties/

or simply

  nosetests uncertainties/

(for a less verbose output).
