(Image credit: Valve) What you need to knowValve is introducing the Steam Families feature, which is now available in the Steam Beta Client. Steam Families allow a group of up to six Steam users to share their games in a collection, allowing members of the family to play the others' games even when everyone is online. Steam Families also feature parental controls that adult users can utilize to monitor and approve child account games and purchases. Sharing games with family on Windows PC just go...