Made fields of `BoxedValue` public.
Made fields of `BoxedValue` public.

hnafar/IronJS,xamarin/IronJS,fholm/IronJS,xamarin/IronJS,fholm/IronJS,xamarin/IronJS,hnafar/IronJS,fholm/IronJS,hnafar/IronJS,fholm/IronJS,xamarin/IronJS,hnafar/IronJS,hnafar/IronJS