Fixed findEntitiesInWiki

- uses PassageExtent model for querying (so only text extent is queried)
- since Anchordestination may have wrong wikititle capitalization, we keep track and recycle if possible
- submit both Wikipedia-based prior resources (PassageRM, and outgoing-Link RM) with simulated counts in SketchTrace

Added PassageWorkingSetExtentModel.java which allows to retrieve passages only from one kind of extent

WikiLinkExtractor is now robust against capitalizations of the destination