Add intermittent field to water* layers (#430 PR #585)

layers/water_name/water_name.yaml

@@ -13,6 +13,10 @@ layer:
           At the moment only `lake` since no ocean parts are labelled. *Reserved for future use*.
       values:
       - lake
+    intermittent:
+      description: |
+        Mark with `1` if it is an [intermittent](http://wiki.openstreetmap.org/wiki/Key:intermittent) lake.
+      values: [0, 1]
   buffer_size: 256
   srs: +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over
   datasource:
@@ -20,7 +24,7 @@ layer:
     key_field: osm_id
     key_field_as_attribute: no
     srid: 900913
-    query: (SELECT osm_id, geometry, name, name_en, name_de, {name_languages}, class FROM layer_water_name(!bbox!, z(!scale_denominator!))) AS t
+    query: (SELECT osm_id, geometry, name, name_en, name_de, {name_languages}, class, intermittent FROM layer_water_name(!bbox!, z(!scale_denominator!))) AS t
 schema:
   - ./update_marine_point.sql
   - ./update_water_lakeline.sql