How to include docs directory in python distribution

I have a python project with the following structure:

Clustering  (project name)  clustering  (package)    clustering.py and other modules    tests  (sub-package)      test_clustering.py and other such files  docs/  bin/

I would like to include the docs directory in my distribution, but I can not seem to do that. Any pointers about how this can be done would be very helpful.

My current setup.py looks like this:

from distutils.core import setupsetup(name='Clustering',      version='1.0',      description='desc',      author='A',      author_email='me@somemail.com',      packages=['clustering', 'clustering.tests'],      requires=['numpy', 'scipy'],      scripts=['bin/predict', 'bin/verify']     )

I tried using the package_data option but haven't been successful in including the docs directory in the distribution. Is there some other conventional way of including your docs in the distribution?