Add revision property necessary for release scripts

pom.xml

@@ -5,7 +5,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.springframework.retry</groupId>
 	<artifactId>spring-retry</artifactId>
-	<version>1.3.2-SNAPSHOT</version>
+	<version>${revision}</version>
 	<name>Spring Retry</name>
 	<description><![CDATA[
 		Spring Retry provides an abstraction around retrying failed operations, with an
@@ -26,6 +26,7 @@
 		</license>
 	</licenses>
 	<properties>
+		<revision>1.3.2-SNAPSHOT</revision>
 		<disable.checks>false</disable.checks>
 		<java.version>1.6</java.version>
 		<maven.test.failure.ignore>true</maven.test.failure.ignore>