Adding test automation allowing a unit test to feed in audio files an…

[gharman]

…d validate text output

The idea here is to automate testing of different audio inputs for both active & passive listening. While this can be used to evaluate module logic, the primary new add is the ability to evaluate audio inputs in the context of a given module and STT/TTS configuration.

Please feel free to suggest/add code polish - Python is not my first language. :-)

[gharman]

Ok, this one is beyond my Python-fu at the moment. Why doesn't Travis like the pyaudio import? These unit tests run on my Pi, and mic.py uses the same import in the same way...