Criterion.rs

Statistics-driven Microbenchmarking in Rust

Due to Brook being missing for extended periods of time, active development of Criterion has moved to a new [Criterion-rs](https://github.com/criterion-rs) organization. Please direct your new PRs and issues to the new [criterion.rs repo](https://github.com/criterion-rs/criterion.rs). Please provide some time for us to catch up and clean the large amount of pending PRs from this repo. Thank you! - Berkus - Lemmih