To be honest, this is the kind of thing that would be great to highlight immediately on https://github.com/rust-lang/cargo https://github.com/rust-lang/cargo or

To be honest, this is the kind of thing that would be great to highlight immediately on https://github.com/rust-lang/cargo https://github.com/rust-lang/cargo or http://doc.crates.io/guide.html http://doc.crates.io/guide.html. I go to those pages and I am given 0 information on how the thing actually works.