[EXAMPLES] Link github and sit examples from the Mime4J index

This makes discovering the examples easier.
diff --git a/src/site/xdoc/index.xml b/src/site/xdoc/index.xml
index c25ba1f..930cb2a 100644
--- a/src/site/xdoc/index.xml
+++ b/src/site/xdoc/index.xml
@@ -1,23 +1,23 @@
 <?xml version="1.0" encoding="ISO-8859-1"?>
 <!-- 
-/****************************************************************

- * Licensed to the Apache Software Foundation (ASF) under one   *

- * or more contributor license agreements.  See the NOTICE file *

- * distributed with this work for additional information        *

- * regarding copyright ownership.  The ASF licenses this file   *

- * to you under the Apache License, Version 2.0 (the            *

- * "License"); you may not use this file except in compliance   *

- * with the License.  You may obtain a copy of the License at   *

- *                                                              *

- *   http://www.apache.org/licenses/LICENSE-2.0                 *

- *                                                              *

- * Unless required by applicable law or agreed to in writing,   *

- * software distributed under the License is distributed on an  *

- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *

- * KIND, either express or implied.  See the License for the    *

- * specific language governing permissions and limitations      *

- * under the License.                                           *

- ****************************************************************/

+/****************************************************************
+ * Licensed to the Apache Software Foundation (ASF) under one   *
+ * or more contributor license agreements.  See the NOTICE file *
+ * distributed with this work for additional information        *
+ * regarding copyright ownership.  The ASF licenses this file   *
+ * to you under the Apache License, Version 2.0 (the            *
+ * "License"); you may not use this file except in compliance   *
+ * with the License.  You may obtain a copy of the License at   *
+ *                                                              *
+ *   http://www.apache.org/licenses/LICENSE-2.0                 *
+ *                                                              *
+ * Unless required by applicable law or agreed to in writing,   *
+ * software distributed under the License is distributed on an  *
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
+ * KIND, either express or implied.  See the License for the    *
+ * specific language governing permissions and limitations      *
+ * under the License.                                           *
+ ****************************************************************/
 
  -->
 <document>
@@ -66,5 +66,15 @@
                 representation constructed by the JavaMail API:s but is more
                 tolerant to messages violating the standards. </p>
         </section>
+        <section name="Examples">
+            <p>
+                As part of our git repository we provide a couple of
+                <a href="https://github.com/apache/james-mime4j/tree/master/examples">
+                examples</a> to ease the use of MIME4J.
+            </p>
+            <p>
+                Read the following <a href="samples.html">page</a>.
+            </p>
+        </section>
     </body>
 </document>