Refactor code by adding camelizer utility

lib/Alchemy/Phrasea/Utilities/String/Camelizer.php

@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Alchemy\Phrasea\Utilities\String;
+
+class Camelizer
+{
+    public function camelize($str, $separator = '_', $pascalCase = false)
+    {
+        $transformStr = str_replace(' ', '', ucwords(str_replace($separator, ' ', $str)));
+
+        return $pascalCase ? $transformStr : lcfirst($transformStr);
+    }
+}