Add nightclub

Re: https://trac.openstreetmap.org/ticket/4025 - added to Food and Drink
section (where bar is) and Sport and Leisure (as it is for leisure
purposes). Also icon in core-pois added.

resources/map_features/amenities.xml

@@ -509,5 +509,21 @@
     <inputSet ref="cuisine"/>
     <inputSet ref="common"/>
   </feature>
+
+
+  <feature name="Nightclub">
+    <category>foodanddrink</category>
+    <category>sport</category>
+    <icon image="features/pois/food_nightclub.n.24.png">
+      ${name}
+    </icon>
+    <point/>
+    <tag k="amenity" v="nightclub"/>
+    <inputSet ref="names"/>
+    <inputSet ref="web"/>
+    <inputSet ref="buildingAddress"/>
+    <inputSet ref="wifi"/>
+    <inputSet ref="common"/>
+  </feature>
 
 </featureGroup>

resources/stylesheets/core_pois.css

@@ -28,6 +28,7 @@ way[amenity=school] :area { color: yellow; fill-color: yellow; fill-opacity: 0.1
 node[amenity=bar] { icon-image: icons/food_bar.n.16.png; text-offset:15; text: name; font-size: 10; z-index: 20; }
 node[amenity=cafe] { icon-image: icons/food_cafe.n.16.png; text-offset:15; text: name; font-size: 10; z-index: 20; }
 node[amenity=fast_food] { icon-image: icons/food_fastfood.n.16.png; z-index: 20; }
+node[amenity=nightclub] { icon-image: icons/food_nightclub.n.16.png; text-offset: 15; text: name; font-size: 10; z-index: 20; }
 node[amenity=pub] { icon-image: icons/food_pub.n.16.png; text-offset: 15; text: name; font-size: 10; z-index: 20; }
 node[amenity=restaurant] { icon-image: icons/food_restaurant.n.16.png; text-offset:15; text: name; font-size: 10; z-index: 20; }
 node[amenity=hospital] { icon-image: icons/health_hospital.n.16.png; z-index: 20; }