npm version badge, travis build check for node 9 and remove extra debug

Author: BL

.travis.yml

@@ -5,4 +5,5 @@ node_js:
   - "6"
   - "7"
   - "8"
+  - "9"
 sudo: false

README.md

@@ -1,4 +1,5 @@
 # amazon-mws (Amazon Marketplace Web Service)
+[![Version](https://img.shields.io/badge/style-plastic-green.svg?longCache=true&style=plastic)](https://www.npmjs.org/package/amazon-mws)
 [![Build Status](https://travis-ci.org/bhushankumarl/amazon-mws.svg?branch=master)](https://travis-ci.org/bhushankumarl/amazon-mws)
 
 This API supported Amazon Marketplace Web Service(MWS)'s standard REST-style API that accepts/returns JSON requests and Here is the [API reference] (http://docs.developer.amazonservices.com/en_IN/dev_guide/DG_IfNew.html)

lib/AmazonMwsResource.js

@@ -246,7 +246,6 @@ AmazonMwsResource.prototype = {
             };
 
             res.on('data', function (chunk) {
-                debug('chunk ', chunk);
                 dbgResponseBuffer.push(chunk);
             });
             res.on('end', function () {