Upgraded to latest Spring Data REST & Spring Boot.

Upgraded to Spring Boot 0.5 snapshots, Hibernate 4.3, Jackson 2.3, JSONPath 0.9.1 and Spring Data REST snapshots. Removed obsolete configuration and added curie provider to render curied links. Updated test cases to adapt to Spring Data REST now rendering HAL by default. Removed obsolete ApplicationConfig class as well as the RestbucksWebApplicationInitializer.