Accuracy Indicator

[xeruf]

As requested in this OSM Help thread as well, an indication of accuracy when geocoding could be helpful:
https://help.openstreetmap.org/questions/12057/bulk-geo-coding-of-business-addresses

Somewhat related to #626

[lonvia]

Photon returns a type property that tells you if the result is an address, a street, a city etc. The possible values are the same as the layer filter values. There is no distance accuracy.