Axel Lehmann

* Removes osm2rdfgeom namespace (`osm2rdfgeom:x` -> `osm2rdf:x`) * Adds missing dataset-id to way intermediates (`osm2rdf:way_123` -> `osm2rdf:osmway_123`)

Introduce writeMeta and use for Nodes, Relations and Ways

1

`writeMeta` adds Facts about `changeset`, `timestamp`, `user`, `version` and `visible`. If these values are not set `0`, `1970-01-01 00:00:00` and `""` depending on the key will be answered.

Basic GeoJSON output

2

This PR adds basic GeoJSON output to osm2rdf for the `hasGeometry` predicate. Other predicates still return only WKT.

Add first AreaMetadata with config option and tests.

2

This PR adds a switch to add the number of outer polygons for areas. This information was partially requested by @jogoe222 and allows SPARQL queries selecting complex areas without parsing...