Thanks for sharing!

The only thing I disagree with is error wrapping. While I agree that the main error should not expose dependencies, I find it useful to keep a `cause` field that corresponds to the inner error. It's important to trace the origin of an error and have more context about it. By the way, Rust's [Error] trait has a dedicated `cause` method for that!

[Error] https://doc.rust-lang.org/nightly/core/error/trait.Error.htm...