Merge pull request #328 from madflow/patch-1

(chore) Fix the Travis build

.travis.yml

@@ -5,7 +5,9 @@ sudo: false
 matrix:
   include:
     - php: 5.2
+      dist: precise
     - php: 5.3
+      dist: precise
     - php: 5.4
     - php: 5.5
     - php: 5.6