(Reuters) - Dunkin' Brands Group Inc reported better-than-expected quarterly same-store sales at its donut stores, as more customers bought its new handcrafted espresso beverages, drip coffees and cold brews, sending its shares up 5 percent.Dunkin', previously known as Dunkin' Donuts, revamped itself to change everything from its logo, store decor and menu to better compete with rivals, which are also tinkering with menu items and store ambience in a cut-throat U.S. coffee market.Along with..