Apple's iOS 7 has been in the hands of developers for more than two weeks now, but tidbits about the operating system continue to come to light each day. Earlier this week we learned that an iOS 7 API disables Snapchat screenshotting and that additional new APIs offer smile and blink detection options for developers creating camera apps. This afternoon, a tipster who spoke to 9to5Mac pointed out a new feature in iOS 7's Accessibility menu, which allows iPhone users to control their devices using head movements. The option can be found in the Switch Control area of the Accessibility menu, which i