The Buffalo Bills have a new founding partner for the newly built Highmark Stadium in Orchard Park. Seneca Resorts and Casinos signed a major deal with the team, announced Monday inside the new Field Club Room.Kevin Nephew, president & CEO, Seneca Resorts and Casinos, spoke at the announcement. "The stadium is built on our land...and we are here to share this announcement," Nephew said.Nephew explained that the partnership had been nearly a year…