Adding env

Author: Tom Clarke

.travis.yml

@@ -1,9 +1,13 @@
 language: php
 
 php:
-  - 5.3
-  - 5.4
-  - 5.5
+    - 5.3
+    - 5.4
+    - 5.5
+
+env:
+    - CI=true
+    - TRAVIS=true
 
 before_script:
     composer install