README.md in tori-0.0.4 vs README.md in tori-0.0.5

@@ -22,10 +22,18 @@
 app/models/photo.rb
 
 ```ruby
 class Photo < ActiveRecord::Base
   tori :image
+
+  after_save do
+    image.write if image.from?
+  end
+
+  after_destroy do
+    image.delete
+  end
 end
 ```
 
 app/controllers/photos_controller.rb
 
@@ -59,19 +67,19 @@
 You can read file.
 
 ```ruby
 photo.image.read #=> image bin
 photo.image.exist? #=> exist check
-photo.image.to_s #=> filename
+photo.image.name #=> filename
 ```
 
 # Custom configure example
 
 ```ruby
 # Save to S3 bucket.
 require 'tori/backend/s3'
-Tori.config.backend = Tori::Backend::S3.new('tori_bucket')
+Tori.config.backend = Tori::Backend::S3.new(bucket: 'tori_bucket')
 
 # Filename decided by model.class.name,id and hidden words.
 Tori.config.filename_callback do |model|
   "#{model.class.name}/#{Digest::SHA1.hexdigest "#{ENV["TORI_MAGICKWORD"]}/#{model.id}"}"
 end
@@ -80,9 +88,5 @@
 # Default configure
 
 [https://github.com/ksss/tori/blob/master/lib/tori.rb](https://github.com/ksss/tori/blob/master/lib/tori.rb)
 
 You can change configure any time.
-
-# future TODO
-
-- support background S3 Storage