Update README

README.md

@@ -4,6 +4,7 @@ jaccord
 [![Maven Central](https://img.shields.io/maven-central/v/com.io7m.jaccord/com.io7m.jaccord.svg?style=flat-square)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.io7m.jaccord%22)
 [![Maven Central (snapshot)](https://img.shields.io/nexus/s/com.io7m.jaccord/com.io7m.jaccord?server=https%3A%2F%2Fs01.oss.sonatype.org&style=flat-square)](https://s01.oss.sonatype.org/content/repositories/snapshots/com/io7m/jaccord/)
 [![Codecov](https://img.shields.io/codecov/c/github/io7m-com/jaccord.svg?style=flat-square)](https://codecov.io/gh/io7m-com/jaccord)
+![Java Version](https://img.shields.io/badge/21-java?label=java&color=007fff)
 
 ![com.io7m.jaccord](./src/site/resources/jaccord.jpg?raw=true)
 
@@ -13,3 +14,16 @@ jaccord
 | OpenJDK (Temurin) LTS | Linux | [![Build (OpenJDK (Temurin) LTS, Linux)](https://img.shields.io/github/actions/workflow/status/io7m-com/jaccord/main.linux.temurin.lts.yml)](https://www.github.com/io7m-com/jaccord/actions?query=workflow%3Amain.linux.temurin.lts)|
 | OpenJDK (Temurin) Current | Windows | [![Build (OpenJDK (Temurin) Current, Windows)](https://img.shields.io/github/actions/workflow/status/io7m-com/jaccord/main.windows.temurin.current.yml)](https://www.github.com/io7m-com/jaccord/actions?query=workflow%3Amain.windows.temurin.current)|
 | OpenJDK (Temurin) LTS | Windows | [![Build (OpenJDK (Temurin) LTS, Windows)](https://img.shields.io/github/actions/workflow/status/io7m-com/jaccord/main.windows.temurin.lts.yml)](https://www.github.com/io7m-com/jaccord/actions?query=workflow%3Amain.windows.temurin.lts)|
+
+## jaccord
+
+The `jaccord` package provides classes for assisting with musical analysis.
+
+## Features
+
+* Written in pure Java 21.
+* High coverage test suite.
+* [OSGi-ready](https://www.osgi.org/)
+* [JPMS-ready](https://en.wikipedia.org/wiki/Java_Platform_Module_System)
+* ISC license.
+