Added new crappy inferencer 2 which does two things only: 1. Forward inference of rdfs:subClassOf 2. Create nao:userVisible properties for all visible resources (We use an int range instead of the "correct" boolean for performance reasons: Virtuoso does not support boolean and Soprano fakes it with strings.) While this is far from optimal it improves the performance of many queries a lot.

In addition this commit hides the nao:userVisible property itself. This is important with the crappy
inferencer 2 which creates nao:userVisible properties for all resources. These would otherwise show
up in Dolphin.