fixed links (closes #375)

Author: fabpot

README.md

@@ -161,14 +161,14 @@ Enjoy!
 [2]:  http://getcomposer.org/
 [3]:  http://symfony.com/download
 [4]:  http://symfony.com/doc/2.1/quick_tour/the_big_picture.html
-[5]:  http://symfony.com/doc/2.1/
+[5]:  http://symfony.com/doc/2.1/index.html
 [6]:  http://symfony.com/doc/2.1/bundles/SensioFrameworkExtraBundle/index.html
 [7]:  http://symfony.com/doc/2.1/book/doctrine.html
 [8]:  http://symfony.com/doc/2.1/book/templating.html
 [9]:  http://symfony.com/doc/2.1/book/security.html
 [10]: http://symfony.com/doc/2.1/cookbook/email.html
 [11]: http://symfony.com/doc/2.1/cookbook/logging/monolog.html
 [12]: http://symfony.com/doc/2.1/cookbook/assetic/asset_management.html
-[13]: http://jmsyst.com/bundles/JMSSecurityExtraBundle/1.1
-[14]: http://jmsyst.com/bundles/JMSDiExtraBundle/1.0
+[13]: http://jmsyst.com/bundles/JMSSecurityExtraBundle/master
+[14]: http://jmsyst.com/bundles/JMSDiExtraBundle/master
 [15]: http://symfony.com/doc/2.1/bundles/SensioGeneratorBundle/index.html