cycle_amenities: exclude charging stations without information about bicycles

(bicycle=no was excluded before)

fixes #40

cycle_amenities.json

@@ -13,7 +13,7 @@
             "node[amenity~\"^(bicycle_rental)$\"];",
             "way[amenity~\"^(bicycle_rental)$\"];",
             "relation[amenity~\"^(bicycle_rental)$\"];",
-            "node[amenity~\"^(charging_station)$\"][bicycle!=\"no\"];",
+            "node[amenity~\"^(charging_station)$\"][bicycle][bicycle!=\"no\"];",
             "node[shop~\"^(bicycle)$\"];",
             "way[shop~\"^(bicycle)$\"];",
             "relation[shop~\"^(bicycle)$\"];",
@@ -24,7 +24,7 @@
             "node[amenity~\"^(bicycle_.*|compressed_air)$\"];",
             "way[amenity~\"^(bicycle_.*|compressed_air)$\"];",
             "relation[amenity~\"^(bicycle_.*|compressed_air)$\"];",
-            "node[amenity~\"^(charging_station)$\"][bicycle!=\"no\"];",
+            "node[amenity~\"^(charging_station)$\"][bicycle][bicycle!=\"no\"];",
             "node[shop~\"^(bicycle)$\"];",
             "way[shop~\"^(bicycle)$\"];",
             "relation[shop~\"^(bicycle)$\"];",