Move to Symfony Flex

The structure changed completely.
Bundles are gone. Everything is flatten in the folder `src`.
I separated import & api controllers to avoid _pollution_ in the main controller folder.

tests/Controller/SettingsControllerTest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Tests\Controller;
+
+use App\Tests\WallabagCoreTestCase;
+
+/**
+ * The controller `SettingsController` does not exist.
+ * This test cover security against the internal settings page managed by CraueConfigBundle.
+ */
+class SettingsControllerTest extends WallabagCoreTestCase
+{
+    public function testSettingsWithAdmin()
+    {
+        $this->logInAs('admin');
+        $client = $this->getTestClient();
+
+        $crawler = $client->request('GET', '/settings');
+
+        $this->assertSame(200, $client->getResponse()->getStatusCode());
+    }
+
+    public function testSettingsWithNormalUser()
+    {
+        $this->logInAs('bob');
+        $client = $this->getTestClient();
+
+        $crawler = $client->request('GET', '/settings');
+
+        $this->assertSame(403, $client->getResponse()->getStatusCode());
+    }
+}