refactor propel configuration

composer.lock

@@ -1,5 +1,5 @@
 {
-    "hash": "b3f80466f5d4e8ce553b10dd65630a69",
+    "hash": "89f5db06d70dd16aa1ba0f4983c89335",
     "packages": [
         {
             "name": "ircmaxell/password-compat",
@@ -619,6 +619,53 @@
             "description": "Symfony Routing Component",
             "homepage": "http://symfony.com",
             "time": "2013-02-11 11:24:47"
+        },
+        {
+            "name": "symfony/yaml",
+            "version": "v2.2.0",
+            "target-dir": "Symfony/Component/Yaml",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/Yaml.git",
+                "reference": "v2.2.0-RC3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/Yaml/zipball/v2.2.0-RC3",
+                "reference": "v2.2.0-RC3",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.2-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Symfony\\Component\\Yaml\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "http://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Yaml Component",
+            "homepage": "http://symfony.com",
+            "time": "2013-01-27 16:49:19"
         }
     ],
     "packages-dev": [