Added PHP 5.6 and HHVM to travis.yml

Author: Nyholm

.travis.yml

@@ -5,16 +5,21 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - hhvm
 
 matrix:
   allow_failures:
     - php: 5.3.3
 
-before_script:
-  - wget -nc http://getcomposer.org/composer.phar
-  - php composer.phar install --dev
+before_install:
+  - composer self-update
 
-script: phpunit
+install:
+  - composer install --dev
+
+script: 
+  - phpunit
 
 notifications:
   email: