Add Travis build file

Author: PhenX

.travis.yml

@@ -0,0 +1,21 @@
+language: php
+
+php:
+  - 5.3
+  - 5.4
+  - 5.5
+  - 5.6
+  - 7.0
+  - hhvm
+
+before_script:
+  - composer self-update
+  - composer install --prefer-source --no-interaction --dev
+
+script: phpunit
+
+matrix:
+  allow_failures:
+    - php: 7.0
+    - php: hhvm
+  fast_finish: true