By Rob Daniel Chipotle, like other chains, takes cues from its rivals. But it also looks to innovate by itself. And it’s taking a $50 million step in exactly that direction. Chipotle (CMG) – Get Chipotle Mexican Grill, Inc. Report takes cues from its rivals in fast food and fast-casual dining. Under Chief Executive Brian Niccol the burrito giant occasionally, and carefully, tinkers with his menu. In March, TheStreet reported, Chipotle made a huge change to one of its core menu items for the first time in its nearly 30-year history. It introduced pollo asado alongside its traditional chicken. C…