Support for release trains in sagan

_includes/build.gradle

@@ -8,11 +8,11 @@ apply plugin: "io.spring.dependency-management"
 
 dependencyManagement {
   imports {
-    mavenBom 'org.springframework.cloud:spring-cloud-starter-parent:Angel.SR3'
+    mavenBom '{@= groupId @}:{@= artifactId @}:{@= version @}'
   }
 }
 
 dependencies {
-    compile 'org.springframework.cloud:spring-cloud-starter-config'
-    compile 'org.springframework.cloud:spring-cloud-starter-eureka'
+    compile '{@= groupId @}:spring-cloud-starter-config'
+    compile '{@= groupId @}:spring-cloud-starter-eureka'
 }

_includes/pom.xml

@@ -1,15 +1,15 @@
 <dependencies>
 	<parent>
-		<groupId>org.springframework.cloud</groupId>
-		<artifactId>spring-cloud-starter-parent</artifactId>
-		<version>Angel.SR3</version>
+		<groupId>{@= groupId @}</groupId>
+		<artifactId>{@= artifactId @}</artifactId>
+		<version>{@= version @}</version>
 	</parent>
     <dependency>
-        <groupId>org.springframework.cloud</groupId>
+        <groupId>{@= groupId @}</groupId>
         <artifactId>spring-cloud-starter-config</artifactId>
     </dependency>
     <dependency>
-        <groupId>org.springframework.cloud</groupId>
+        <groupId>{@= groupId @}</groupId>
         <artifactId>spring-cloud-starter-eureka</artifactId>
     </dependency>
 </dependencies>

index.html

@@ -98,7 +98,8 @@ is a number.
 
 To use Spring Cloud in a traditional Java or Groovy project using
 Maven or Gradle, you can use the BOM only for dependency management or as a parent POM (Maven
-only). Example using the latest version:
+only). Example using the latest version with the config client and eureka (change the 
+artifact ids to pull in other starters):
 
 {% include download_widget.md %}