Usability improvements, icons, and a less intrusive speed display.
  * Joypad SVG now has a dead zone in the middle which doesn't actuate any of the directional buttons
  * Controls logic now allows sliding your finger onto another button to acuate it
  * Adding this as an button on mobile devices' home screens will now use a custom icon
  * Moved Runs Per Second logic into debug.js and changed it to only update the display once every 75 iterations