Update to fix std::str::from_utf8{,_owned}.
Remove unnecessary parentheses.

These were all my fault and slipped in by accident when I was still learning
Rust. In Python I never put in such parentheses, but for a curly-brace language
I was still getting used to the freedom…
codegen: add Clone to deriving annotation for Status
Merge pull request #55 from olsonjeffery/status-clone

codegen: add Clone to deriving annotation for Status