After Apple ’s Worldwide Developers Conference last week, everyone was talking about new hardware. The company introduced  its new HomePod speaker, a competitor to Amazon’s Echo, and unveiled a new iMac Pro, along with upgraded iMacs and MacBooks.   The  company also announced an update to its mobile operating system — the  one that powers the millions of iPhones and iPads that have become a  common part of everyday life for many people. Apple will roll out iOS 11  this fall, with a host of new features.   What are they? Let’s take a look.   ‘Do Not Disturb While Driving’