Cargo subcommand for downloading crate sources

``` USAGE: cargo dl [OPTIONS]

ARGS:

        Optionally including which version of the crate to download after
        `@`, in the standard semver constraint format used in Cargo.toml. If
        unspecified the newest non-prerelease, non-yanked version will be
        fetched.

OPTIONS: --allow-yanked Allow yanked versions to be chosen

-e, --extract
        Specify this flag to have the crate extracted automatically.

        Note that unless changed via the --output flag, this will extract
        the files to a new subdirectory bearing the name of the downloaded
        crate archive.

-h, --help
        Print help information

    --no-cache
        Disable checking cargo cache for the crate file

-o, --output <OUTPUT>
        Normally, the compressed crate is written to a file (or directory if
        --extract is used) based on its name and version.  This flag allows
        to change that by providing an explicit file or directory path.
        (Only when downloading a single crate)

-V, --version
        Print version information

```

Rust Version Policy

This crate only supports the current stable version of Rust, patch releases may use new features at any time.

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you shall be dual licensed as above, without any additional terms or conditions.