Our latest poll – “What’s the maximum price you’d pay for an iPhone 5/5s/iPod touch 5G-only game controller?” – has now ended. With iOS 7 adding official support for iPhone and iPod game controllers, we asked our readers to let us know what they would consider to be a fair price for such an accessory, assuming it worked only with the iPhone 5, iPhone 5s, and fifth-generation iPod touch. The majority of responses—fifty-one…