Apple is making major changes to its U.S. iOS App Store policies, and developers are now able to direct customers to a non-App Store purchasing option for digital goods. Apple is allowing apps to feature a single link to a developer website that leads to an in-app purchase alternative, but Apple plans to continue to collect a 12 to 27 percent commission on content bought this way. Apple's update and the backstory that led to it are a bit complicated, but what iPhone and iPad users need to know i...