Fix performance and add animation support

Added

• Improved example app to include more options
  • Added by William Entriken
• Allow animation for changes to zoom
  • Added by William Entriken

Fixed

• Improved accuracy of waveform rendering
  • Added by Kip Nicol
• Fixed waveform rendering for large audio files
  • Added by Kip Nicol
• Fixed crash with quick load time
  • Added by William Entriken in Regards to Issue
    #76.