Attempt to use my wdtk-processor in DM4 as an OSGi bundle.
Got wdtk dumpfile processor working in Plugin impl.
Revised WikidataPersonaProcessor, basic import functional.
Revised code, added data on official websites.
Addded cities, countries and entity alreadyExists()#.
Added descr. to persons + institutions, revised comments.
Removed WDTK-SNAPSHOT dependencies.
Added workspace assignment, URLs and delete command.
Upgraded dm4-wikidata for DeepaMehta 4.4

Changes:
- WDEntitities of type=property now have re-enabled navigation to involved "items" enabled again.
  Given a property, one can navigate to all (imported) items which "Claims" make use of this property.
  This kind of "bonus feature" was formerly de-activated due to (#672).
- Never download JSON-dumps from /wikidatawiki, use-dump is just functional with existing dumps.
- All topics imported via dumps are associated with the "Wikidata" Workspace automatically.
- More clear exception handling for development
Integrated rendering of claimed Commons Media topics.

Changes:
Extracted the WDTK Toolkit / Dumpfile Processor Part from this plugin
due to the WDTK JDK 1.7 Dependency.
Merged branch use-dump into master