Fixed Array.sort incorrectly sorting it's entire dense array, rather than the items that are externally indexable.
Fixed Array.sort incorrectly sorting it's entire dense array, rather than the items that are externally indexable.

This fixes #45.

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