bumped version nr to 0.4.0
bumped version nr to 0.4.0

BrewPi/firmware,BrewPi/firmware,BrewPi/firmware,BrewPi/firmware,glibersat/firmware,glibersat/firmware,etk29321/firmware,glibersat/firmware,glibersat/firmware,glibersat/firmware,BrewPi/firmware,etk29321/firmware,BrewPi/firmware,etk29321/firmware,BrewPi/firmware,glibersat/firmware,etk29321/firmware,etk29321/firmware,BrewPi/firmware,etk29321/firmware,glibersat/firmware