Add webhook to travis file

.travis.yml

@@ -8,4 +8,7 @@ env:
   - SYMFONY_VERSION=origin/2.0
 
 before_script: php Tests/tests/vendors.php
-script: phpunit
+script: phpunit
+
+notifications:
+    webhooks: http://sonata-project.org/bundles/admin/2-0/travis