allow empty configuration for widgets

DependencyInjection/ChillMainExtension.php

@@ -77,7 +77,10 @@ class ChillMainExtension extends Extension implements PrependExtensionInterface,
         
         // add the key 'widget' without the key 'enable'
         $container->setParameter('chill_main.widgets', 
-            array('homepage' => $config['widgets']['homepage']));
+            isset($config['widgets']['homepage']) ? 
+                array('homepage' => $config['widgets']['homepage']):
+                array()
+                );
 
         $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('services.yml');

DependencyInjection/Configuration.php

@@ -68,7 +68,8 @@ class Configuration implements ConfigurationInterface
                     ->end() // end of children
                 ->end() // end of pagination
                 ->arrayNode('widgets')
-                    ->canBeDisabled()
+                    ->canBeEnabled()
+                    ->canBeUnset()
                     ->children()
                          ->append($this->addWidgetsConfiguration('homepage', $this->containerBuilder))
                     ->end() // end of widgets/children