Update README.rst

README.rst

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 robustness package
 ==================
 Install via ``pip``: ``pip install robustness``
+Read the docs: https://robustness.readthedocs.io/en/latest/index.html
 
 ``robustness`` is a package we (students in the `MadryLab <http://madry-lab.ml>`_) created
 to make training, evaluating, and exploring neural networks flexible and easy.
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 *(Have you used the package and found it useful? Let us know!)*.
 
-Documentation
---------------
-https://robustness.readthedocs.io/en/latest/index.html
+Contributors
+-------------
+- `Andrew Ilyas <https://twitter.com/andrew_ilyas>`_
+- `Logan Engstrom <https://twitter.com/logan_engstrom>`_
+- `Shibani Santurkar <https://twitter.com/ShibaniSan>`_
+- `Dimitris Tsipras <https://twitter.com/tsiprasd>`_