DOC: Update README.rst: Add links to flask_debugtoolbar and pyramid_debugtoolbar

.. _flask_debugtoolbar: https://github.com/mgood/flask-debugtoolbar
.. _pyramid_debugtoolbar: https://github.com/Pylons/pyramid_debugtoolbar
Merge pull request #15 from westurner/patch-5

DOC: Update README.rst: Add links to flask_debugtoolbar and pyramid_debugtoolbar