Added coordinates and geometries to existing geojson files

[blacktoby]

I have added coordinates and geometry data to the exsting geojson files.
Data is taken from suche-postleitzahl.org, which is freely available under the odbl license.

@stepps00 @thisisaaronland I hope to see the merge soon, if everything is fine with the formatting!

Thanks!

[stepps00]

Hey @blacktoby thanks for the changes. Unfortunately, the oDbL license attached to the OSM data in this changeset is incompatible with Who's On First's data license, so these geometries can't be imported. Who's On First requires license terms that are CC0 (public domain), CC-BY, or equivalent.

Do you happen to have / know of a secondary source that falls under these terms? Adding geometries to these features would be a huge improvement.