Added an extra level for modules where applicable

Author: robtimus

README.md

@@ -1,18 +1,19 @@
-[This page](https://robtimus.github.io/whats-new-in-java/) shows all packages, classes and members (constructors, fields and methods) that have been added for each Java version since Java 5.0.
+[This page](https://robtimus.github.io/whats-new-in-java/) shows all modules, packages, classes and members (constructors, fields and methods) that have been added for each Java version since Java 5.0.
 
 ## Results
 
-The results are nested in 4 levels:
-1. The Java version that has introduced the package, class or member.
+The results are nested in 4 or 5 levels:
+1. The Java version that has introduced the module, package, class or member.
+1. Java 9 and later only: the module that was introduced, or the module of the package that was introduced, or the module of the package of the class that was introduced, or the module of the package of the enclosing class of the member that was introduced.
 1. The package that was introduced, or the package of the class that was introduced, or the package of the enclosing class of the member that was introduced.
 1. The class that was introduced, or the enclosing class of the member that was introduced.
 1. The member that was introduced.
 
 ### Navigating results
 
-Click on a Java version, package or class to toggle the visibility of its packages, classes or members respectively.
+Click on a Java version, module, package or class to toggle the visibility of its modules, packages, classes or members respectively.
 
-If a package or class has a ![Java](https://robtimus.github.io/whats-new-in-java/css/img/java.png) icon after its name, this means the package or class itself is introduced in the given Java version. Clicking on the package or class will open the package or class in Oracle's online API.
+If a module, package or class has a ![Java](https://robtimus.github.io/whats-new-in-java/css/img/java.png) icon after its name, this means the module, package or class itself is introduced in the given Java version. Clicking on the module, package or class will open the module, package or class in Oracle's online API.
 
 ### Filtering results