JSON or other programmatic access to lib.rs data

At Microsoft we are working on better tracking of OSS package quality, starting with Rust crates. Consuming data from lib.rs would be relevant and helpful as a signal for this system. However, at the moment lib.rs seems to present its data only in rendered HTML form.

This issue requests some JSON API or other programmatically consumable representation of lib.rs's data, to allow lib.rs information to be consumed without needing to scrape HTML since that is so notoriously fragile.