+ Driver ARE SWEEEEET!

 * LEDs Driver usage:
   write 2 values, first have to be in the range [1, 8]
   indicating which LED number to change, and the second
   value have to be 0 or 1, indicating if the LED should
   be turned on or off.

 * Buttons Driver usage:
   read 1 or 2 value.
   First value will always be current state of the buttons,
   0 indicating non is active, 1,2,3,4,5,6,7,8 indicates
   buttons which are pressed.

   If 2 values are requested, the second value will give
   the last active button status. Meaning the value cannot
   be zero.