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/Version20160916201049.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace DoctrineMigrations;
+
+use App\Doctrine\WallabagMigration;
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * Added pocket_consumer_key field on wallabag_config.
+ */
+class Version20160916201049 extends WallabagMigration
+{
+    public function up(Schema $schema): void
+    {
+        $configTable = $schema->getTable($this->getTable('config'));
+
+        $this->skipIf($configTable->hasColumn('pocket_consumer_key'), 'It seems that you already played this migration.');
+
+        $configTable->addColumn('pocket_consumer_key', 'string', ['notnull' => false]);
+        $this->addSql('DELETE FROM ' . $this->getTable('craue_config_setting') . " WHERE name = 'pocket_consumer_key';");
+    }
+
+    public function down(Schema $schema): void
+    {
+        $configTable = $schema->getTable($this->getTable('config'));
+        $configTable->dropColumn('pocket_consumer_key');
+        $this->addSql('INSERT INTO ' . $this->getTable('craue_config_setting') . " (name, value, section) VALUES ('pocket_consumer_key', NULL, 'import')");
+    }
+}