Decouple the software from a specific audio setup

[wrmilling]

While I can modify the software to point directly to my specific audio setup, could you look into separating this out to a configuration file for specifying the hardware to use for input/output? This would help greatly in the future for integrating jasper into existing setups.

[qpaulson]

And also ideally make it smarter so it auto-detects the devices and selects the right one if one is not configured in said configuration file..

I've done this in an app which is very simular to Jasper VoiceExec, which you can feel free to scavange the code from: https://github.com/qpaulson/VoiceExec

I also have a pretty good weather module which I am planning to port over to Jasper as well as google TTS and Google STT support.

[astahlman]

See #100, in which I've factored out a new speaker module which detects the current platform at runtime and selects the appropriate system command. Currently RPi and OS X are supported.