Add std.native & move std.xz/gzip to this

[stephenamar-db]

• Add support std.native
• Move our non-standard std.xz/std.gzip to this.
• Add gzip support to scala native.

[jordanmoxon-db]

Will existing calls to std.xz/std.gzip fail in this implementation?
If so, can we have some kind of transition flag so that we can migrate the use cases?

[stephenamar-db]

I put them in both places for now