Added configuring repository by annotation

Configuration/Search.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace FOQ\ElasticaBundle\Configuration;
+
+/**
+ * Annotation class for setting search repository.
+ *
+ * @author Richard Miller <info@limethinking.co.uk>
+ * @Annotation
+ * @Target("CLASS")
+ */
+class Search
+{
+
+    /** @var string */
+    public $repositoryClass;
+
+}