Re-introduce fake user-agent

lib/tools/phantomas/phantomasWrapper.js

@@ -26,6 +26,7 @@ var PhantomasWrapper = function() {
             // Cusomizable options
             timeout: task.options.timeout || 60,
             'js-deep-analysis': task.options.jsDeepAnalysis || false,
+            'user-agent': 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.110 Safari/537.36',
 
             // Mandatory
             reporter: 'json:pretty',