Added docstring to setup.py.
Added docstring to setup.py.

embaldridge/retriever,bendmorris/retriever,embaldridge/retriever,davharris/retriever,goelakash/retriever,davharris/retriever,davharris/retriever,goelakash/retriever,bendmorris/retriever,embaldridge/retriever,henrykironde/deletedret,henrykironde/deletedret,bendmorris/retriever