#37 - Upgrade to Spring Data release train Fowler M1.
#35 - Added example for Map-based repositories.

WORK IN PROGRESS, TODOs:

- Remove Querydsl dependency (for some reason we get a NoClassDefFoundError in case we don't have Querydsl on the classpath, despite the fact that a guard exists in SD Commons repository factory).
- The lack of an identifier property should either be handled gracefully (picking up a field named 'id'?) or rejected explicitly.
#35 - Switch to Spring Data KeyValue.