Substantial refactoring of code structure

src/iiif/IIIFResource.js

@@ -0,0 +1,19 @@
+/**
+ * @interface
+ */
+class IIIFResource {
+
+    /**
+     * @param {Number} IIIFApiVersion 
+     * @param {String} baseURL 
+     */
+    constructor(IIIFApiVersion, baseURL) {
+        this.context = `https://iiif.io/api/presentation/${IIIFApiVersion}/context.json`;
+        this.BASE_URL = baseURL;
+    }
+
+    generateId(serviceURL, filename) {}
+    toObject() {}
+}
+
+export default IIIFResource;