loadTabs has no function and is transferred at /defaultJavascripts nontheless
avoided Exception which was caused by too early access to some database related functions while server/db startup has not finished:
call to OrderContainers is moved from TagManager.init (which was dangerous) to InternalDispatcher, listening to event 'room::public::userEntered'. Side effect of this is the reordering of GlobalContainers every time a user enters the public room.

Added object.persist() to persist the reordering changes to the objects and inform the clients.
Merge branch 'develop' of https://github.com/winfel/wa_knowledge_structuring into develop