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/Version20160410190541.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace DoctrineMigrations;
+
+use App\Doctrine\WallabagMigration;
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * Added foreign keys for account resetting.
+ */
+class Version20160410190541 extends WallabagMigration
+{
+    public function up(Schema $schema): void
+    {
+        $entryTable = $schema->getTable($this->getTable('entry'));
+
+        $this->skipIf($entryTable->hasColumn('uid') || $entryTable->hasColumn('uuid'), 'It seems that you already played this migration.');
+
+        $entryTable->addColumn('uid', 'string', [
+            'notnull' => false,
+            'length' => 23,
+        ]);
+
+        $sharePublic = $this->container
+            ->get('doctrine.orm.default_entity_manager')
+            ->getConnection()
+            ->fetchOne('SELECT * FROM ' . $this->getTable('craue_config_setting') . " WHERE name = 'share_public'");
+
+        if (false === $sharePublic) {
+            $this->addSql('INSERT INTO ' . $this->getTable('craue_config_setting') . " (name, value, section) VALUES ('share_public', '1', 'entry')");
+        }
+    }
+
+    public function down(Schema $schema): void
+    {
+        $entryTable = $schema->getTable($this->getTable('entry'));
+        $entryTable->dropColumn('uid');
+
+        $this->addSql('DELETE FROM ' . $this->getTable('craue_config_setting') . " WHERE name = 'share_public'");
+    }
+}