Auto navigation set within Mapbox Streets gazetteer

[nickidlugash]

Per https://github.com/mapbox/carto-cam/issues/47, we're creating a set of Places in the Mapbox Streets gazetteer designed for QA-ing auto navigation map styles. This is done by adding a new key to the geojson feature's "properties" object:

"sets": ["Auto Navigation"]

• Find existing Places in gazetteer that are relevant to this set and assign them this "set" value
• Compile new Places for this set and add to gazetteer (in progress)

/cc @dasulit @aparlato @natslaughter

[natslaughter]

@nickidlugash how can I add locations for the Auto Navigation set, and what variables are needed other than lon/lat? I've found Paris to be a good resource for several tunnel layers:

layer	lon	lat
tunnel-street	2.347	48.862
tunnel-street-limited	2.347	48.862
tunnel-service-link-track	2.347	48.862
tunnel-pedestrian	2.347	48.862
tunnel-construction	2.345	48.860

cc @dasulit

[dasulit]

@natslaughter Nicki posted a good template for what a feature should look like in gazetteer: #17 (comment). We're adding new places in this PR: #19. It would be great to have better documentation about how to add new places, I can do this once I can get back to carto-cam later today!