Add missing dependencies

composer.json

@@ -30,11 +30,13 @@
         "sensio/generator-bundle": "~2.3",
         "symfony/translation":"~2.3",
         "symfony/dependency-injection": "~2.3,>=2.3.3",
+        "symfony/property-access": "~2.3",
         "twig/twig": "~1.15",
         "twig/extensions": "~1.0",
         "sonata-project/exporter": "~1.0",
         "sonata-project/block-bundle": "~2.3",
         "doctrine/common": "~2.2",
+        "doctrine/inflector": "~1.0",
         "knplabs/knp-menu-bundle": ">=2.0,<3.0.0",
         "knplabs/knp-menu": ">=2.0,<3.0"
     },