updated travis config

Author: Sven Loth

.travis.yml

@@ -2,17 +2,29 @@ language: php
 
 php:
   - 5.3
+  - 5.4
+  - 5.5
+  - 5.6
+  - hhvm
 
 env:
-  - SYMFONY_VERSION=v2.1.7
-  - SYMFONY_VERSION=origin/2.1
+  - SYMFONY_VERSION=2.3.*
+  - SYMFONY_VERSION=2.4.*
+  - SYMFONY_VERSION=2.5.*
+  - SYMFONY_VERSION=2.6.*
+  - SYMFONY_VERSION=2.7.*@dev
 
 before_script:
   - wget -nc http://getcomposer.org/composer.phar
   - php composer.phar install
 
 script: phpunit
 
+matrix:
+  allow_failures:
+    - php: hhvm
+    - env: SYMFONY_VERSION=2.7.*@dev
+
 notifications:
   email:
-    - sven@hipaway.com
+    - sven.loth@me.com