[maven-release-plugin] prepare for next development iteration
Merge branch 'release/0.9.12' into develop
version upgrades

* bump java version to 1.7
* upgrade slf4j, spring, spring-security, spring-data, joda, hibernate and lombok
Merge branch 'release/0.9.13'

* release/0.9.13:
  version upgrades
  [maven-release-plugin] prepare for next development iteration