Updates to the recipe for the sound sensor

New File: images/soundSensor.png
  This is the sound sensor fritzing diagram needed for the sound recipe.

Modified File: recipes/_posts/2014-06-02-sound-sensor.md
  I've updated this recipe to include all the information we have made
  in our design discussions up to this point. Added a fritzing diagram.
  Pointed our decided upon best practices. Filled out the parts list
  with parts from SparkFun.

Modified File: recipes/_posts/2014-06-05-getting-started-with-zetta.md
  This was just my file of thoughts for our recipes. Structure ideas for
  our recipes. Ideas around hardware projects too.