Add place=quarter to city subdivisions (#1065)

This adds `place=quarter` which was introduced in 2011 as a subdivision
of villages/towns/cities as a value that sits between `place=suburb` and
`place=neighbourhood`. It has by now been used over 40,000 times and is
rendered in the OSM-Carto.

layers/landuse/landuse.yaml

@@ -38,6 +38,7 @@ layer:
       - theme_park
       - zoo
       - suburb
+      - quarter
       - neighbourhood
       - dam
   datasource:

layers/landuse/mapping.yaml

@@ -12,7 +12,7 @@ generalized_tables:
   # etldoc: osm_landuse_polygon_gen_z9 -> osm_landuse_polygon_gen_z8
   landuse_polygon_gen_z8:
     source: landuse_polygon_gen_z9
-    sql_filter: area>power(ZRES6,2) AND (landuse='residential' OR place='suburb' OR place='neighbourhood')
+    sql_filter: area>power(ZRES6,2) AND (landuse='residential' OR place='suburb' OR place='quarter' OR place='neighbourhood')
     tolerance: ZRES8
   # etldoc: osm_landuse_polygon_gen_z10 -> osm_landuse_polygon_gen_z9
   landuse_polygon_gen_z9:
@@ -98,6 +98,7 @@ tables:
       - zoo
       place:
       - suburb
+      - quarter
       - neighbourhood
       waterway:
       - dam