AMQP-437: Update Spring, RabbitMQ Versions

JIRA: https://jira.spring.io/browse/AMQP-437

Add a note about compatibility to the reference document.

Add Gradle Dependency Example to Quick Tour

build.gradle

@@ -80,9 +80,9 @@ subprojects { subproject ->
 		log4jVersion = '1.2.17'
 		logbackVersion = '1.1.2'
 		mockitoVersion = '1.9.5'
-		rabbitmqVersion = project.hasProperty('rabbitmqVersion') ? project.rabbitmqVersion : '3.3.5'
+		rabbitmqVersion = project.hasProperty('rabbitmqVersion') ? project.rabbitmqVersion : '3.4.1'
 
-		springVersion = project.hasProperty('springVersion') ? project.springVersion : '4.1.1.RELEASE'
+		springVersion = project.hasProperty('springVersion') ? project.springVersion : '4.1.2.RELEASE'
 
 		springRetryVersion = '1.1.2.RELEASE'
 	}

src/reference/docbook/quick-tour.xml

@@ -19,7 +19,24 @@
   <artifactId>spring-rabbit</artifactId>
   <version>${version}</version>
 </dependency>]]></programlisting>
+	<para>
+		And for gradle:
+	</para>
+	<programlisting>compile 'org.springframework.amqp:spring-rabbit:${version}'</programlisting>
 
+	<section>
+		<title>Compatibility</title>
+		<para>
+			While the default Spring Framework version dependency is 4.1.x, Spring AMQP is generally compatible
+			with earlier versions of Spring Framework. Annotation-based listeners and the
+			<classname>RabbitMessagingTemplate</classname> require Spring Framework 4.1, however.
+		</para>
+		<para>
+			Similarly, the default <code>amqp-client</code> version is 3.4.x but the framework is
+			generally compatible with earlier versions. However, of course, features that rely
+			on newer client versions will not be available.
+		</para>
+	</section>
     <section>
       <title>Very, Very Quick</title>