Move to Spring Boot 1.1.0.BUILD-SNAPSHOT and Java 8.

Switched to Java 8 date/time types.
Improved publication of OrderPaidEvent.

Dropped the implementation of even publication using aspects in favor of the tiny spring-tx-events helper library. OrderPaidEvent now implements TransactionBoundApplicationEvent so that the TransactionAwareApplicationEventMulticaster multicasts the event on transaction commit.
Upgraded to Spring Boot 1.1.1.RELEASE.
Use OrderProjection as excerpt projection for Orders.

See [0] for details.

[0] https://github.com/spring-projects/spring-data-rest/commit/1034ffaeaca943467ada45b77e4b54590ff7ed2c