[DataFixtures] Added a new way to load data fixtures

DataFixtures/DataLoaderInterface.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * This file is part of the PropelBundle package.
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @license    MIT License
+ */
+
+namespace Propel\PropelBundle\DataFixtures;
+
+interface DataLoaderInterface
+{
+    /**
+     * Loads data from a set of files.
+     *
+     * @param array $files              A set of files containing datas to load.
+     * @param string $connectionName    The Propel connection name
+     */
+    function load($files = array(), $connectionName);
+}