Merge pull request phpDocumentor#33 from Nyholm/patch-1

Added PHP 5.6 and HHVM to travis.yml

Author: mvriel

.travis.yml

@@ -4,6 +4,14 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - hhvm
+  - hhvm-nightly
+ 
+matrix:
+    allow_failures:
+        - php: hhvm
+        - php: hhvm-nightly
 
 script:
  - vendor/bin/phpunit