Added method to allow retrieve all registered entity namespace aliases.

lib/Doctrine/ORM/Configuration.php

@@ -163,6 +163,16 @@ class Configuration extends \Doctrine\DBAL\Configuration
     {
         $this->_attributes['entityNamespaces'] = $entityNamespaces;
     }
+    
+    /**
+     * Retrieves the list of registered entity namespace aliases.
+     * 
+     * @return array
+     */
+    public function getEntityNamespaces()
+    {
+        return $this->_attributes['entityNamespaces'];
+    }
 
     /**
      * Gets the cache driver implementation that is used for the mapping metadata.