Improve the 10,000 coins animation

[AgustinVallejo]

There are some ideas floating around on how the 10,000 coins animation could be improved, mainly for performance reasons. Some of them:

1. Use sprites to render more coin nodes that fly into the measurement zone
2. Hollywood the number of coins so that they seem like a lot but not actually that number.
3. Render a swarm of pixels that populate the pixel representation square (the QR thing) like Tony Stark's nanobots (my favourite).

TBD