Changes
* already shipped everything
* need to write some things to explain how it works (a bit of calcul for the peaks wouldn't be so bad.
* Explanation are here: https://en.wikipedia.org/wiki/Joule_thief.
===== full adder =====
* By gcmalloc
* A very simple way to have raspberry pi easily accessible to try out :)
* need an ap, a switch and 5 raspi(I will bring an ap and a raspi)
===== Tonality decoder =====
