v0.8.1

Selective Disables For From

From now accepts arguments to only disable certain From implementations. e.g.

error_set! {
    U = {
        IoError(std::io::Error),
    };
    V = {
        FmtError(std::fmt::Error),
        IoError(std::io::Error),
    };
    #[disable(From(std::io::Error, U))]
    W = V || U;
}

Full Changelog: v0.8...v0.8.1