Update travis setup and ensure tests can be run

Author: rowanbeentje

.travis.yml

@@ -4,4 +4,4 @@ script:
 language: node_js
 
 node_js:
-  - "0.10"
+  - "6"

README.md

@@ -1,4 +1,4 @@
-# FTColumnflow [![Build Status](https://travis-ci.org/ftlabs/ftcolumnflow.png?branch=master)](https://travis-ci.org/ftlabs/ftcolumnflow)
+# FTColumnflow [![Build Status](https://api.travis-ci.com/ftlabs/ftcolumnflow.svg)](https://travis-ci.com/ftlabs/ftcolumnflow)
 
 FTColumnflow is a polyfill that fixes the inadequacies of CSS column layouts.  It is developed by [FT Labs](http://labs.ft.com), part of the Financial Times.  It is extensively used in the [FT Web App](http://app.ft.com), where it allows us to publish articles with complex newspaper/magazine style layouts, including features such as:
 

package.json

@@ -25,7 +25,7 @@
     "grunt": "~0.4",
     "grunt-cli": "~0.1",
     "grunt-buster": "~0.3",
-    "phantomjs": "~1.9"
+    "phantomjs": "~2"
   },
   "license": "MIT",
   "homepage": "https://github.com/ftlabs/ftcolumnflow"