Precalculate lighting by editor script

With the new lighting in unity 5 when you precalculate lighting in all scenes but later change meshes or prefabs shared in multiple scenes you need to precalculate lighting again. Having more than 30 scenes... I wish to know if there's a way to write an editor script to open every scene and precalculate lighting with the predefined settings, I have been searching a little but with no luck at all, so is this possible?