If you saw the Oscar Award-winning movie “12 Years a Slave,” you saw the result of the video editing software made by Burlington-based Avid Technology. The company touted all of the Oscar-nominated movies made using its software this week, after the Academy Awards were handed out Sunday. More than half of the movies nominated for Best Picture are on that list, including “American Hustle," “Captain Phillips," “Gravity” and “Nebraska,” in addition to “12 Years a Slave.” In the…