title: How to customize "Overview" page in JavaDoc?
body: <p>I'd like the "<strong>Overview</strong>" page of my library's javadoc to essentially be a user/API guide for the entire JAR. I know that adding a <code>package-info.java</code> class to a package allows you to write <em>package-level</em> javadocs, but what about at the <em>jar-level</em>?</p>
  
  <p>I know I could put a <code>README.md</code> in my project's root, but I like to think of README's as a doc for library developers (that is, people who will be <em>maintaining</em> the library). But the JavaDocs are API guides for people who will be <em>using</em> the library.</p>