Latest sound additions, plus music sketch.

The music and sounds don't really fit. I will address that tomorrow.
committing before merge
Merge branch 'master' of https://github.com/khalladay/1GAM-Jan-HaikuRacer
Final sound commit perhaps? got rid of many unused sounds and added final music track.

the XML plays a lot of unused sounds at 0.0 gain. I tried taking them
out but that would crash the game so I left them there at 0.0.

Ended up going for one "landing" sound with slight variation to
simplify the soundscape, and also took out the turn left/right sounds.
Merge pull request #4 from khalladay/master

Final Pull to 1GAM