JSF & PrimeFaces & Spring tutorial 8: Maven compile to Java 8

How to compile project sources to a Java 8 version.

download result: https://app.box.com/s/k5qun81kse862f1jgjc1

pom.xml:
<plugin>
	<groupId>org.apache.maven.plugins</groupId>
	<artifactId>maven-compiler-plugin</artifactId>
	<version>3.2</version>
	<configuration>
		<source>1.8</source>
		<target>1.8</target>
	</configuration>
</plugin>