.. _`PyPI`: http://pypi.python.org/pypi/rpi-backlight
.. _`GitHub`: https://github.com/linusg/rpi_backlight

.. _`PyPI`: https://pypi.org/project/rpi_backlight/
.. _`GitHub`: https://github.com/linusg/rpi_backlight

Update link to PyPI in docs
Update link to PyPI in docs