Apple TV Software 7.0 has been released for the third-generation Apple TV, bringing a new Beats Music channel to the set-top box. As in the case of the iOS app, the Beats Music channel prompts users to sign in or get started on a 14-day free trial. The software update also includes the flatter, redesigned look we previously detailed when the software was in its fourth beta. As seen in that beta, support for Family Sharing and iCloud Photos have also…