Changes
* Hotspotting provides a new method MergeToRevisionDoc now (analogue to MergeToSourceDoc)
* MRO Task Owner uses a Metareference now. Linked objects are displayed as such - and not only their UID.
* Importing a proxy which refers to itself does not create a 2nd (broken) proxy with the same external primary key. The proxy reference (to itself) is correct now.
