updated readme

README.md

@@ -2,3 +2,26 @@ cas
 ===
 
 CAS server SSO authentication in laravel 4.x
+
+## Installation
+
+Require this package in your composer.json and run composer update (or run `composer require XavRsl/Cas:dev-master` directly):
+
+    "XavRsl/Cas": "dev-master"
+
+After updating composer, add the ServiceProvider to the providers array in app/config/app.php
+
+    'XavRsl/Cas/CasServiceProvider',
+
+As well as the Facade :
+
+	'Cas' => 'Xavrsl\Cas\Facades\Cas',
+
+You need to publish the conf so you will ffind it in app/config/packages/xavrsl/cas/
+
+    $ php artisan config:publish xavrsl/cas
+
+Usage
+==
+
+Authenticate against the CAS server