Added some new documentation, like contribute, with details about the
development process and added to the index some existing
documentation, like the em module.
Sphinx now uses numpydoc extension, so that docstrings appear just as
they do on numpy's documentation.
To build the docs, run "make html" from the doc/ directory.
From: Fabian Pedregosa <fabian.pedregosa@inria.fr>
git-svn-id: https://scikit-learn.svn.sourceforge.net/svnroot/scikit-learn/trunk@357 22fbfee3-77ab-4535-9bad-27d1bd3bc7d8
Fabian Pedregosa