update readme

Author: newpavlov

README.md

@@ -1,16 +1,18 @@
-# RustCrypto: Password Hashes [![Project Chat][chat-image]][chat-link] [![dependency status][deps-image]][deps-link]
+# RustCrypto: Password Hashes
+
+[![Project Chat][chat-image]][chat-link] [![dependency status][deps-image]][deps-link] ![Apache2/MIT licensed][license-image]
 
 Collection of password hashing algorithms, otherwise known as password-based key derivation functions, written in pure Rust.
 
 ## Supported Algorithms
 
 | Algorithm | Crate | Crates.io  | Documentation | MSRV |
 |-----------|-------|:----------:|:-------------:|:----:|
-| [Argon2] | `argon2` | [![crates.io](https://img.shields.io/crates/v/argon2.svg)](https://crates.io/crates/argon2) | [![Documentation](https://docs.rs/argon2/badge.svg)](https://docs.rs/argon2) | ![MSRV 1.51][msrv-1.51] |
-| [bcrypt-pbkdf] | `bcrypt-pbkdf` |[![crates.io](https://img.shields.io/crates/v/bcrypt-pbkdf.svg)](https://crates.io/crates/bcrypt-pbkdf) | [![Documentation](https://docs.rs/bcrypt-pbkdf/badge.svg)](https://docs.rs/bcrypt-pbkdf) | ![MSRV 1.51][msrv-1.51] |
-| [PBKDF2] | `pbkdf2` | [![crates.io](https://img.shields.io/crates/v/pbkdf2.svg)](https://crates.io/crates/pbkdf2) | [![Documentation](https://docs.rs/pbkdf2/badge.svg)](https://docs.rs/pbkdf2) | ![MSRV 1.51][msrv-1.51] |
-| [scrypt] | `scrypt` | [![crates.io](https://img.shields.io/crates/v/scrypt.svg)](https://crates.io/crates/scrypt) | [![Documentation](https://docs.rs/scrypt/badge.svg)](https://docs.rs/scrypt) | ![MSRV 1.51][msrv-1.51] |
-| [SHA-crypt] | `sha-crypt` | [![crates.io](https://img.shields.io/crates/v/sha-crypt.svg)](https://crates.io/crates/sha-crypt) | [![Documentation](https://docs.rs/sha-crypt/badge.svg)](https://docs.rs/sha-crypt) | ![MSRV 1.51][msrv-1.51] |
+| [Argon2] | [`argon2`] | [![crates.io](https://img.shields.io/crates/v/argon2.svg)](https://crates.io/crates/argon2) | [![Documentation](https://docs.rs/argon2/badge.svg)](https://docs.rs/argon2) | ![MSRV 1.51][msrv-1.51] |
+| [bcrypt-pbkdf] | [`bcrypt-pbkdf`] |[![crates.io](https://img.shields.io/crates/v/bcrypt-pbkdf.svg)](https://crates.io/crates/bcrypt-pbkdf) | [![Documentation](https://docs.rs/bcrypt-pbkdf/badge.svg)](https://docs.rs/bcrypt-pbkdf) | ![MSRV 1.51][msrv-1.51] |
+| [PBKDF2] | [`pbkdf2`] | [![crates.io](https://img.shields.io/crates/v/pbkdf2.svg)](https://crates.io/crates/pbkdf2) | [![Documentation](https://docs.rs/pbkdf2/badge.svg)](https://docs.rs/pbkdf2) | ![MSRV 1.51][msrv-1.51] |
+| [scrypt] | [`scrypt`] | [![crates.io](https://img.shields.io/crates/v/scrypt.svg)](https://crates.io/crates/scrypt) | [![Documentation](https://docs.rs/scrypt/badge.svg)](https://docs.rs/scrypt) | ![MSRV 1.51][msrv-1.51] |
+| [SHA-crypt] | [`sha-crypt`] | [![crates.io](https://img.shields.io/crates/v/sha-crypt.svg)](https://crates.io/crates/sha-crypt) | [![Documentation](https://docs.rs/sha-crypt/badge.svg)](https://docs.rs/sha-crypt) | ![MSRV 1.51][msrv-1.51] |
 
 Please see the [OWASP Password Storage Cheat Sheet] for assistance in selecting an appropriate algorithm for your use case.
 
@@ -35,10 +37,19 @@ Unless you explicitly state otherwise, any contribution intentionally submitted
 
 [chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
 [chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/260046-password-hashes
+[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
 [deps-image]: https://deps.rs/repo/github/RustCrypto/password-hashes/status.svg
 [deps-link]: https://deps.rs/repo/github/RustCrypto/password-hashes
 [msrv-1.51]: https://img.shields.io/badge/rustc-1.51.0+-blue.svg
 
+[//]: # (crates)
+
+[`argon2`]: ./argon2
+[`bcrypt-pbkdf`]: ./bcrypt-pbkdf
+[`pbkdf2`]: ./pbkdf2
+[`scrypt`]: ./scrypt
+[`sha-crypt`]: ./sha-crypt
+
 [//]: # (general links)
 
 [Argon2]: https://en.wikipedia.org/wiki/Argon2