Replace placeholder README with more useful info@

Author: IsaacWoods

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pci_types"
-version = "0.6.0"
+version = "0.6.1"
 authors = ["Isaac Woods"]
 repository = "https://github.com/rust-osdev/pci_types"
 description = "Library with types for handling PCI devices"

README.md

@@ -1,5 +1,17 @@
 # `pci_types`
-
+![Build Status](https://github.com/rust-osdev/pci_types/actions/workflows/build.yml/badge.svg)
+[![Version](https://img.shields.io/crates/v/pci_types.svg?style=rounded-square)](https://crates.io/crates/pci_types/)
 [![docs.rs](https://docs.rs/pci_types/badge.svg)](https://docs.rs/pci_types/)
+[![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
+
+`pci_types` is a library that provides various types for handling PCI/PCIe enumeration and configuration.
+
+## Licence
+This project is dual-licenced under:
+- Apache Licence, Version 2.0 ([LICENCE-APACHE](LICENCE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+- MIT license ([LICENCE-MIT](LICENCE-MIT) or http://opensource.org/licenses/MIT)
 
-Library with types for handling PCI devices. Work in progress.
+Unless you explicitly state otherwise, any contribution submitted for inclusion in this work by you,
+as defined in the Apache-2.0 licence, shall be dual licenced as above, without additional terms or
+conditions.