Add classic jar file

For those that can't handle module-info.class
Fixes #188

pom.xml

@@ -8,7 +8,7 @@
   <parent>
     <groupId>org.joda</groupId>
     <artifactId>joda-parent</artifactId>
-    <version>1.0.3</version>
+    <version>1.0.4</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <artifactId>joda-beans</artifactId>

src/changes/changes.xml

@@ -14,6 +14,10 @@
         Aliases are useful for handling the rename of properties.
         Fixes #187.
       </action>
+      <action dev="jodastephen" type="fix">
+        Add classic jar file for those that can't handle module-info.class.
+        Fixes #188.
+      </action>
     </release>
     <release version="2.1" date="2018-02-19" description="v2.1">
       <action dev="jodastephen" type="remove">

src/site/markdown/index.md

@@ -123,6 +123,18 @@ Available in [Maven Central](http://search.maven.org/#artifactdetails%7Corg.joda
 </dependency>
 ```
 
+The main jar file is based on Java 8 but contains a `module-info.class` file for Java 9 and later.
+If you have problems with this, there is a "classic" variant you can use instead:
+
+```xml
+<dependency>
+  <groupId>org.joda</groupId>
+  <artifactId>joda-beans</artifactId>
+  <version>2.1.1</version>
+  <classifier>classic</classifier>
+</dependency>
+```
+
 For Java SE 6 compatibility, use [release 1.14](https://github.com/JodaOrg/joda-beans/releases/tag/v1.14).
 
 See the [related projects](related.html) page for Maven, Gradle and IntelliJ integration.