Add ghost bikes, fix build

Customizations/Layouts/GhostBikes.ts

@@ -0,0 +1,23 @@
+import {Layout} from "../Layout";
+import {GhostBike} from "../Layers/GhostBike";
+import Combine from "../../UI/Base/Combine";
+import Translations from "../../UI/i18n/Translations";
+
+export class GhostBikes extends Layout {
+    constructor() {
+        super("ghostbikes",
+            ["en"],
+            "Ghost Bike Map",
+            [new GhostBike()],
+            6,
+            50.423,
+            5.493,
+            new Combine(["<h3>", "A map of Ghost Bikes", "</h3>",
+                "A <b>ghost bike</b> is a memorial for a cyclist who died in a traffic accident," +
+                " in the form of a white bicycle placed permanently near the accident location.",
+                "On this map, one can see the location of known ghost bikes, and (with a free OpenStreetMap account) easily add missing and new Ghost Bikes"])
+        );
+        
+        this.icon = "./assets/bike/ghost.svg";
+    }
+}