Version 0.13 Released

New audio in the arena and general visual updates! Generally tightening up the base gameplay.

• Don't show the beat indicator until a full measure is ready.
• Update version number to v0.13
• Timing visual updates
  • Zoom in across a bar (optional setting)
  • Change indicator visual to something more legible
  • Add the audience animation to the bottom of the pit
• Show an indicator where the player clicked/tapped
• Show an optional line indicating direction on a successful click/tap
• Create a settings menu for turning features on/off
• Re-org code for re-usability and collaboration
• Update README with information on how to organize code and run the project