Record and Play buttons work, record is on it's own thread now, piping to output wav file.

- in portrait capture and move to FFT view.
- scroll view doesn't have the correct grid spacing, make the grid programmatically
- needs to slow down audio polling and hook in play button and add in process and viewing realtime result
- connect up audio polling to drive SurfaceView updates
- pulled out system UI hide and will refactor that separately