A new feature discussed at the Worldwide Developer’s Conference has appeared in the first beta of the iOS 8 version of Apple TV softwre, released on Tuesday. The new feature is the iCloud-based Family Sharing function, which allows up to six family members to access purchased iTunes content from any of the registered devices in the household running OS X 10.10 Yosemite or iOS 8, both of which will be released this fall. The change allows a household to access everyone’s media purchases without changing accounts….