Spring Boot now provides the result of an ExitCodeExceptionMapper via an
event called ExitCodeEvent. This commit takes advantage of this new
event.
Resolvesspring-cloud/spring-cloud-task#48
* Timestamp Demonstrates a Spring boot/task application as a single java file.
* HelloWorld Demonstrates a Spring boot/task application using java configuration.
resolvesspring-cloud/spring-cloud-task#23