Dependency version upgrades.

Spring Data JPA 1.4.0.RC1 -> 1.4.2.RELEASE.
Spring 3.2.3.RELEASE -> 3.2.5.RELEASE.
Hibernate 4.2.3.Final -> 4.2.6.Final.
JodaTime 2.2 -> 2.3.
Querydsl 2.6.0 -> 3.2.4
Remove usage of deprecated methods.
Upgraded to Spring Boot.