Apple has added the FXNOW channel to Apple TV. It was reported in July that FXNOW would be arriving on Apple’s set-top box in the next 12 months — that time has already come. FXNOW is the on-demand service for FX, FXX, and FXM, and as such, the channel features a number of FX shows, and a surprising amount of popular movies, as well. Authentication of a cable subscription is required to access the content….