updated version to 2.8

Author: fabpot

README.md

@@ -11,7 +11,7 @@ Resources
 
 Documentation:
 
-http://symfony.com/doc/2.7/book/security.html
+http://symfony.com/doc/2.8/book/security.html
 
 Tests
 -----

composer.json

@@ -42,7 +42,7 @@
     "minimum-stability": "dev",
     "extra": {
         "branch-alias": {
-            "dev-master": "2.7-dev"
+            "dev-master": "2.8-dev"
         }
     }
 }