Revisions history
-----------------

    * 2020-07-16: Ver 0.9.c - Luca
       - Changes in [I/O Pin]<>[Car Color] association to match
         the desired Phisical Buttons Layout (Quick Start Guide)
       - Box/Pitlane
         - Entry/exit point marked to help put in place led strip (circuit shape)
         - Coin "Boost" scaled up to make "catch it" worth (almost always win the race)
       - Minor bugfix:
         - box_init(), box_isactive() use wrong var "rampactive"
 
    * 2020-07-16: Ver 0.9.b - Gerardo
       - Sound FX added  

    * 2019-10-10 - Ver 0.9.a
       -First public Version by Angel Maldonado (Maker Faire Roma 2019)