Update Java Tools page after Tracer extraction

Fixes #275

Conflicts:
	site/java-tools.xml

Author: acogoluegnes

site/java-tools.xml

@@ -120,10 +120,11 @@ limitations under the License.
     <doc:section name="tracer">
       <doc:heading>Tracer</doc:heading>
       <p>
-        There's a very basic, very simple AMQP protocol analyzer in
-        class <code>com.rabbitmq.tools.Tracer</code>. Invoke it with
+        The tracer is a very basic, very simple AMQP protocol analyzer.
+        Use it with
+        the <code>runtracer</code> or <code>runtracer.bat</code> script:
       </p>
-      <pre>runjava.sh com.rabbitmq.tools.Tracer <i>listenPort</i> <i>connectHost</i> <i>connectPort</i></pre>
+      <pre>runtracer <i>listenPort</i> <i>connectHost</i> <i>connectPort</i></pre>
       <dl>
         <dt>listenPort</dt>
         <dd>port to listen for incoming AMQP connections on - defaults to 5673.</dd>
@@ -132,6 +133,17 @@ limitations under the License.
         <dt>connectPort</dt>
         <dd>port number to use when making an outbound connection - defaults to 5672.</dd>
       </dl>
+
+      <doc:subsection name="tracer-download">
+        <doc:heading>Download and source code</doc:heading>
+        <p>
+          <a href="https://github.com/rabbitmq/rabbitmq-tracer/releases">Releases</a>
+        </p>
+        <p>
+          <a href="https://github.com/rabbitmq/rabbitmq-tracer">Source code</a>
+        </p>
+      </doc:subsection>
+
     </doc:section>
   </body>
 </html>