Make amazons3 config to be BC. Added UPGRADE file

DependencyInjection/Factory/AmazonS3AdapterFactory.php

@@ -25,6 +25,8 @@ class AmazonS3AdapterFactory implements AdapterFactoryInterface
 
         if (isset($config['options'])) {
             $definition->addArgument($config['options']);
+        } elseif (isset($config['create'])) {
+            $definition->addArgument(array('create' => $config['create']));
         }
     }
 
@@ -49,6 +51,7 @@ class AmazonS3AdapterFactory implements AdapterFactoryInterface
             ->children()
                 ->scalarNode('amazon_s3_id')->isRequired()->cannotBeEmpty()->end()
                 ->scalarNode('bucket_name')->isRequired()->cannotBeEmpty()->end()
+                ->booleanNode('create')->end()
                 ->arrayNode('options')
                     ->children()
                         ->booleanNode('create')

UPGRADE

@@ -0,0 +1,31 @@
+UPGRADE FROM 0.1 to 0.2
+=======================
+
+### AmazonS3 
+
+* In 0.2 we pass additional options for AmazonS3 Gaufrette provider AmazonS3 config was changed (old way is DEPRECIATED)
+
+before:
+
+```yml
+knp_gaufrette:
+    adapters:
+        adaptername:
+            amazon_s3:
+                amazon_s3_id: amazon_s3.service.id
+                bucket_name: mybucketname
+                create: true
+```
+
+after:
+
+```yml
+knp_gaufrette:
+    adapters:
+        adaptername:
+            amazon_s3:
+                amazon_s3_id: amazon_s3.service.id
+                bucket_name: mybucketname
+                options:
+                    create: true
+```