Added .getClassList(). Resolves #1

classes/VirtuellerStundenplan.js

@@ -53,6 +53,19 @@ class VirtuellerStundenplan {
         };
     }
 
+    /**
+     * Returns all classes of the school.
+     * 
+     * @returns {String[]}
+     */
+    async getClassList() {
+        const data = await this.request("RESTKlassenliste.php");
+        return {
+            head: new Head(data.Msg),
+            content: data.Klassen,
+        };
+    }
+
     /**
      * Returns all Messages.
      *