Add badges to README

README.md

@@ -1,5 +1,10 @@
 # Roboto: Parse and use robots.txt files
 
+[![crate][crate-image]][crate-link]
+[![Docs][docs-image]][docs-link]
+[![Build Status][build-image]][build-link]
+![MIT licensed][license-image]
+
 Roboto provides a type-safe way to parse and use robots.txt files. It is based on the [Robots Exclusion Protocol](https://en.wikipedia.org/wiki/Robots_exclusion_standard) and is used to approximately try control the behavior of web crawlers and other web robots.
 
 ## Installation
@@ -26,3 +31,11 @@ let user_agent = "googlebot".parse().unwrap();
 
 assert_eq!(robots.is_allowed(&user_agent, "/public"), true);
 ```
+
+[crate-image]: https://buildstats.info/crate/roboto
+[crate-link]: https://crates.io/crates/roboto
+[docs-image]: https://docs.rs/roboto/badge.svg
+[docs-link]: https://docs.rs/roboto/
+[build-image]: https://github.com/alexrudy/roboto/actions/workflows/ci.yml/badge.svg
+[build-link]: https://github.com/alexrudy/roboto/actions/workflows/ci.yml
+[license-image]: https://img.shields.io/badge/license-MIT-blue.svg