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.

migrations/Version20170606155640.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace DoctrineMigrations;
+
+use App\Doctrine\WallabagMigration;
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * Remove wallabag_url from craue_config_setting.
+ * It has been moved into the parameters.yml.
+ */
+class Version20170606155640 extends WallabagMigration
+{
+    public function up(Schema $schema): void
+    {
+        $this->skipIf(!$schema->hasTable($this->getTable('craue_config_setting')), 'Table already renamed');
+
+        $apiUserRegistration = $this->container
+            ->get('doctrine.orm.default_entity_manager')
+            ->getConnection()
+            ->fetchOne('SELECT * FROM ' . $this->getTable('craue_config_setting') . " WHERE name = 'wallabag_url'");
+
+        $this->skipIf(false === $apiUserRegistration, 'It seems that you already played this migration.');
+
+        $this->addSql('DELETE FROM ' . $this->getTable('craue_config_setting') . " WHERE name = 'wallabag_url'");
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('INSERT INTO ' . $this->getTable('craue_config_setting') . " (name, value, section) VALUES ('wallabag_url', 'wallabag.me', 'misc')");
+    }
+}