Use SpeechSynthesisUtterance so KITT can have a voice

[btopro]

implement https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisUtterance http://caniuse.com/#search=SpeechSynthesisUtterance is at 67% Here's a very early demo of the idea without KITT -- https://www.youtube.com/watch?v=jPKmFlUFDsM