By: Addison Wylie There’s a world where rainbows cross the sky day in and day out, animals play in harmony, and shiny people joyfully smile without a care to be had.  I know it exists because I’ve just seen Common People, a sweet British film that’s available right now on iTunes to rent or purchase. Stewart Alexander and Kerry Skinner’s film is one of these vehicles where movie goers are dropped off in tiny slices…