diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Config/Writer/Yaml.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Config/Writer/Yaml.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,144 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Config
+ * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Yaml.php 23294 2010-11-05 00:27:34Z ramon $
+ */
+
+/**
+ * @see Zend_Config_Writer
+ */
+require_once 'Zend/Config/Writer/FileAbstract.php';
+
+/**
+ * @see Zend_Config_Yaml
+ */
+require_once 'Zend/Config/Yaml.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Config
+ * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Config_Writer_Yaml extends Zend_Config_Writer_FileAbstract
+{
+    /**
+     * What to call when we need to decode some YAML?
+     *
+     * @var callable
+     */
+    protected $_yamlEncoder = array('Zend_Config_Writer_Yaml', 'encode');
+
+    /**
+     * Get callback for decoding YAML
+     *
+     * @return callable
+     */
+    public function getYamlEncoder()
+    {
+        return $this->_yamlEncoder;
+    }
+
+    /**
+     * Set callback for decoding YAML
+     *
+     * @param  $yamlEncoder the decoder to set
+     * @return Zend_Config_Yaml
+     */
+    public function setYamlEncoder($yamlEncoder)
+    {
+        if (!is_callable($yamlEncoder)) {
+            require_once 'Zend/Config/Exception.php';
+            throw new Zend_Config_Exception('Invalid parameter to setYamlEncoder - must be callable');
+        }
+
+        $this->_yamlEncoder = $yamlEncoder;
+        return $this;
+    }
+
+    /**
+     * Render a Zend_Config into a YAML config string.
+     *
+     * @since 1.10
+     * @return string
+     */
+    public function render()
+    {
+        $data        = $this->_config->toArray();
+        $sectionName = $this->_config->getSectionName();
+        $extends     = $this->_config->getExtends();
+
+        if (is_string($sectionName)) {
+            $data = array($sectionName => $data);
+        }
+
+        foreach ($extends as $section => $parentSection) {
+            $data[$section][Zend_Config_Yaml::EXTENDS_NAME] = $parentSection;
+        }
+
+        // Ensure that each "extends" section actually exists
+        foreach ($data as $section => $sectionData) {
+            if (is_array($sectionData) && isset($sectionData[Zend_Config_Yaml::EXTENDS_NAME])) {
+                $sectionExtends = $sectionData[Zend_Config_Yaml::EXTENDS_NAME];
+                if (!isset($data[$sectionExtends])) {
+                    // Remove "extends" declaration if section does not exist
+                    unset($data[$section][Zend_Config_Yaml::EXTENDS_NAME]);
+                }
+            }
+        }
+
+        return call_user_func($this->getYamlEncoder(), $data);
+    }
+
+    /**
+     * Very dumb YAML encoder
+     *
+     * Until we have Zend_Yaml...
+     *
+     * @param array $data YAML data
+     * @return string
+     */
+    public static function encode($data)
+    {
+        return self::_encodeYaml(0, $data);
+    }
+
+    /**
+     * Service function for encoding YAML
+     *
+     * @param int $indent Current indent level
+     * @param array $data Data to encode
+     * @return string
+     */
+    protected static function _encodeYaml($indent, $data)
+    {
+        reset($data);
+        $result = "";
+        $numeric = is_numeric(key($data));
+
+        foreach($data as $key => $value) {
+            if(is_array($value)) {
+                $encoded = "\n".self::_encodeYaml($indent+1, $value);
+            } else {
+                $encoded = (string)$value."\n";
+            }
+            $result .= str_repeat("  ", $indent).($numeric?"- ":"$key: ").$encoded;
+        }
+        return $result;
+    }
+}