setup travis ci

.travis.yml

@@ -0,0 +1,12 @@
+language: php
+
+php:
+  - '5.4'
+  - '5.5'
+  - '5.6'
+  - '7.0'
+  - nightly
+
+install: composer install
+
+script: phpunit --verbose

README.md

@@ -1 +1,2 @@
 [![PHP version](https://badge.fury.io/ph/fphammerle%2Fhelpers.svg)](https://badge.fury.io/ph/fphammerle%2Fhelpers)
+[![Build Status](https://travis-ci.org/fphammerle/php-helpers.svg?branch=master)](https://travis-ci.org/fphammerle/php-helpers)