Merge branch 'Nyholm-patch-1'

Merge in Nyholms change, php 5.5, 5.6 and hhvm added to travis.yml

.travis.yml

@@ -1,7 +1,14 @@
 language: php
 php:
-  - 5.4
   - 5.3
+  - 5.4
+  - 5.5
+  - 5.6
+  - hhvm
+matrix:
+  allow_failures:
+    - php: hhvm
+  fast_finish: true
 before_script:
   - composer install --dev
   - composer update satooshi/php-coveralls --dev