Vending machines and food might conjure up some negative images: -Shaking the machine when your potato chips get stuck. -Not the best options for dining. CBS 2’s Vince Gerasole reports that’s all changing. He paid a visit to a vending machine trade show in Chicago. How’s this for a treat? A TCBY yogurt with Oreo crumbs. It starts with a touch screen where you choose sizes, flavors and toppings. No, an army of oompa loompas isn’t inside the big box. It’s a robotic assembly line. Meanwhile, Matty Castellano is selling fresh pizza from a vending machine....