New support requested for Unity *.prefab and Unreal *.asset

[MarkWaldo]

It would be great for you to add support for Unity *.prefab and Unreal *.asset files. The only way we can look at them outside of those programs is to convert them to a format you support. Since both of these game engines are used by hundreds of thousands of users, it would be nice to be able to look at the models outside of those programs.