RTD API Page Doesn't Render

[sommersoft]

During review of ADS1x15 PR #19, I was comparing docstrings/RTD and noticed that the API doesn't render for MCP3xxx. docs/api.rst needs to be updated to:

.. automodule:: adafruit_mcp3xxx.adafruit_mcp3xxx
   :members:

.. automodule:: adafruit_mcp3xxx.adafruit_mcp3004
   :members:

.. automodule:: adafruit_mcp3xxx.adafruit_mcp3008
   :members:

.. automodule:: adafruit_mcp3xxx.analog_in
   :members:

[evaherrada]

Fixed in #14. Closed.