[SPR-6222] Updating PetClinic tutorial.

org.springframework.samples.petclinic/src/main/webapp/html/tutorial.html

@@ -1030,9 +1030,9 @@
 	  <li>Download and install a <a href="http://java.sun.com/" target="_blank">Java</a>
 		Software Developer Kit, version 1.5 or later</li>
 	  <li>Download and install <a href="http://ant.apache.org" target="_blank">Apache Ant</a>,
-		preferably version 1.7.0 or later</li>
+		preferably version 1.7.1 or later</li>
 	  <li>Download and install <a href="http://jakarta.apache.org/tomcat/index.html" target="_blank">Apache Tomcat</a>,
-		preferably version 6.0.18 or later</li>
+		preferably version 6.0.20 or later</li>
 	  <li>Download and install <a href="http://dev.mysql.com/downloads/" target="_blank">MySQL</a>,
 		preferably version 5.1.x or later (optional)</li>
 	  <li><a href="http://hsqldb.sourceforge.net/" target="_blank">Hypersonic SQL</a>, and
@@ -1040,7 +1040,7 @@
 		application.</li>
 	  <li>PetClinic and Spring use the <a href="http://www.apache.org/" target="_blank">Apache</a>
 		<a href="http://commons.apache.org/logging/" target="_blank">Commons Logging</a>
-		and <a href="http://logging.apache.org/log4j/1.2/apidocs/index.html" target="_blank">log4j</a>
+		and <a href="http://logging.apache.org/log4j/" target="_blank">log4j</a>
 		packages.</li>
 	</ul>