Restructure libraries.

assets/geojson.php

@@ -0,0 +1,11 @@
+<?php
+
+use Netzmacht\Contao\Leaflet\Controller\GeoJsonController;
+
+define('TL_MODE', 'FE');
+require(dirname(dirname(dirname($_SERVER['SCRIPT_FILENAME']))) . '/system/initialize.php');
+
+$container  = $GLOBALS['container'];
+$controller = new GeoJsonController($container['leaflet.map.service'], $container['input']);
+
+$controller->execute();