map: define layers in config.js

config.js.example

@@ -3,5 +3,19 @@ define({
   "siteName": "Freifunk Lübeck",
   "mapSigmaScale": 0.5,
   "showContact": true,
-  "maxAge": 14
+  "maxAge": 14,
+  "mapLayers": [
+    { "name": "MapQuest",
+      "url": "https://otile{s}-s.mqcdn.com/tiles/1.0.0/osm/{z}/{x}/{y}.jpg",
+      "config": {
+        "subdomains": "1234",
+        "type": "osm",
+        "attribution": "Tiles &copy; <a href=\"https://www.mapquest.com/\" target=\"_blank\">MapQuest</a>, Data CC-BY-SA OpenStreetMap",
+        "maxZoom": 18
+      }
+    },
+    {
+      "name": "Stamen.TonerLite"
+    }
+  ]
 })