Release Notes: This release contains a huge update to the user management module. The data model now contains relations between groups and rolls to ease configuration. The administration UI has been greatly reworked. The new implementation of global error and exception handling eases configuration of custom routines. The Generic OR mapper now supports loading tree structures using the loadObjectTree() method. Service implementation is easier with the 1.15 DI container. Each service may define a setup method which is called after preparation to control initialization.