Function map_model::make::buildings::make_all_buildings

pub fn make_all_buildings(
    input: &BTreeMap<OsmID, RawBuilding>, 
    map: &Map, 
    keep_bldg_tags: bool, 
    timer: &mut Timer<'_>
) -> Vec<Building>

Finalize importing of buildings, mostly by matching them to the nearest sidewalk.