Update Readme

Author: Rahe

README.md

@@ -21,11 +21,9 @@ into :
 
 # How ?
 
-## 1 - Add to [Composer](http://composer.rarst.net/)
+## 1 - Add to Composer
 
-- Add repository source : `{ "type": "vcs", "url": "https://github.com/BeAPI/composer-make-stable" }`.
-- Include `"bea/composer/make-stable": "dev-master"` in your composer file as require-dev.
-- Before use, launch `composer update`.
+- Make `composer require "bea/composer/make-stable": "dev-master" --dev`.
 
 ## 2 - Run command
 Then you can simply launch `composer make-stable` !