Add helper to set version

buildhelper/all/pom.xml

+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>org.springframework.boot</groupId>
+	<artifactId>spring-boot-build-all</artifactId>
+	<version>0.5.0.BUILD-SNAPSHOT</version>
+	<packaging>pom</packaging>
+	<prerequisites>
+		<maven>3.0.0</maven>
+	</prerequisites>
+	<properties>
+		<main.basedir>${basedir}/../..</main.basedir>
+	</properties>
+	<modules>
+		<module>../..</module>
+		<module>../../spring-boot-samples</module>
+	</modules>
+</project>
\ No newline at end of file

buildhelper/all/setversion.sh

+if [ -z "$1" ]; then
+	echo "Specify the new version"
+	exit 1
+fi
+cd ../../spring-boot-dependencies
+mvn versions:set -DgenerateBackupPoms=false -DnewVersion=$1
+cd ..
+mvn versions:set -DgenerateBackupPoms=false -DnewVersion=$1
+cd buildhelper/all
+mvn versions:set -DgenerateBackupPoms=false -DnewVersion=$1
+mvn -N versions:update-child-modules -DgenerateBackupPoms=false
+cd ../../spring-boot-starters
+mvn -N validate
+cd ../buildhelper/all