Ravinia Brewing, a 10-year-old craft brewer that agreed to give up its moniker after a legal trademark battle with Ravinia Festival, is rebranding as Steep Ravine Brewing Co. The name is changing, but many of the beers and one of its iconic logos — a bicycle-riding “tree guy” — will remain the same. “This is a pivotal day in our evolution, and we’re moving forward under this new brand,” Kris Walker, co-founder of Ravinia Brewing, said Tuesday.