We’re past Memorial Day, and that means two things: barbecue season, and software season.    Apple’s Worldwide Developer Conference, WWDC, kicks off Monday. It’s an event where Apple gathers engineers from everywhere to announce its vision for the future of software, and to answer their questions about how to make today’s apps work better.  Who cares? Well, if you use an iPhone, iPad, Mac, you’re probably getting new software, even if you don’t buy a new device. And if you’re a tech watcher, you get some hints about what’s coming in the next generations of iPhones and iPads.   Joining me to talk Apple, tech labor and more, I’ve got the father of tech reviews, a pioneer in tech journalism, Walt Mossberg.