add allow contacts (default: true)
move sim to its own home
rework README with new images, thanks to @Ilithy
update Arabic, French, Turkish, Japanese, Italian translations

Thanks to:
DJEBBARI.ABDELHAMID
@Ilithy
Oğuz Ersen (@ersen0)
Guillaume BOEHM (@guillaumeboehm)
Giovanni Donisi (@gdonisi + @giovannidonisi)
