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/Version20170127093841.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace DoctrineMigrations;
+
+use App\Doctrine\WallabagMigration;
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * Added indexes on wallabag_entry.is_starred and wallabag_entry.is_archived.
+ */
+class Version20170127093841 extends WallabagMigration
+{
+    private $indexStarredName = 'IDX_entry_starred';
+    private $indexArchivedName = 'IDX_entry_archived';
+
+    public function up(Schema $schema): void
+    {
+        $entryTable = $schema->getTable($this->getTable('entry'));
+        $this->skipIf($entryTable->hasIndex($this->indexStarredName) && $entryTable->hasIndex($this->indexArchivedName), 'It seems that you already played this migration.');
+
+        $entryTable->addIndex(['is_starred'], $this->indexStarredName);
+        $entryTable->addIndex(['is_archived'], $this->indexArchivedName);
+    }
+
+    public function down(Schema $schema): void
+    {
+        $entryTable = $schema->getTable($this->getTable('entry'));
+        $this->skipIf(false === $entryTable->hasIndex($this->indexStarredName) && false === $entryTable->hasIndex($this->indexArchivedName), 'It seems that you already played this migration.');
+
+        $entryTable->dropIndex($this->indexStarredName);
+        $entryTable->dropIndex($this->indexArchivedName);
+    }
+}