Geojson features format examples available at examples directory

Those data models containing examples with a geoproperty, now there also include another file named: example-geojsonfeature.json with this format.

So not all the data models include this example, which is generated automatically (so there is not a need to be contributed).

See an example: https://github.com/smart-data-models/dataModel.PointOfInterest/blob/master/PointOfInterest/examples/example-geojsonfeature.json