upgrade maven release plugin version
[maven-release-plugin] prepare release maven-plugin-2.3
[maven-release-plugin] prepare for next development iteration
unused message (orphaned since 5848d3f08584eccd11336e293d3ace305c9e1bd0)
unused message (orphaned since 76740511a1ec268652ee3f5b1e25189fd48b55e5)
updated German localization