[Imports] Import "Schweizer Familie Feuerstellen" / Firepits Switzerland

[michael spreng]

Hi Ilja

Thank you for discussing this with the community first.

I'm from Switzerland and familiar with those "Schweizer Familie
Feuerstellen". I had a look a the data this morning. The license issue
has already been mentioned (we need some documentation that that we can
use the data for OSM) As well as the tags issue was already raised by
Martin, with whom I agree.

Existing data:
The other thing I see, is that many of those fire pits are already
mapped. So we would need a plan how to detect already mapped points and
what to do with them. See this comparison: http://umap.osm.ch/m/2442/

best regards
Michael