Some JavaDoc improvements, copyright headers. Using a logger instead of System.out in the test case now. Removed commented out dependency declaration from JPA pom.xml.
We now activate the JSR-310 AttributeConverters shipped with Spring Data JPA 1.8. Removed the dependency to Jadira user types and switch to non-time-zoned Java 8 LocalDateTime.
Original pull request: #46.
Upgraded to Jadira Usertypes 3.2 to be able tu use Hibernate-specific UserType to make sure JDK 8 date/time types get converted into appropriate SQL types by the persistence provider.
Abbreviated JPA sample module folder names. Renamed the Java 8 auditing sample module to Java 8 module as it not only contains samples for auditing anymore.
