added examples for alchemy

Author: germanattanasio

README.md

@@ -20,6 +20,8 @@ APIs and SDKs that use cognitive computing to solve complex problems.
     * [Getting the Service Credentials](#getting-the-service-credentials)
     * [Alchemy Services](#alchemy-services)
       * [Alchemy Language](#alchemy-language)
+      * [Alchemy Vision](#alchemy-vision)
+      * [Alchemy Data News](#alchemy-data-news)
     * [IBM Watson Services](#ibm-watson-services)
       * [Authorization](#authorization)
       * [Concept Expansion](#concept-expansion)
@@ -124,6 +126,55 @@ alchemy_language.sentiment(params, function (err, response) {
 });
 ```
 
+### Alchemy Vision
+[Alchemy Vision][alchemy_vision] uses deep learning innovations to understand a picture's content and context. It sees complex visual scenes in their entirety —without needing any textual clues— leveraging a holistic approach to understanding the multiple objects and surroundings.
+
+Example: Extract keywords from an image.
+
+```javascript
+var watson = require('watson-developer-cloud');
+var fs = require('fs');
+
+var alchemy_vision = watson.alchemy_vision({
+  api_key: '<api_key>'
+});
+
+var params = {
+  image: fs.fs.createReadStream('src/test/resources/obama.jpg')
+};
+
+alchemy_vision.getImageKeywords(params, function (err, keywords) {
+  if (err)
+    console.log('error:', err);
+  else
+    console.log(JSON.stringify(keywords, null, 2));
+});
+```
+
+### Alchemy Data News
+[Alchemy Data News][alchemy_data_news] indexes 250k to 300k English language news and blog articles every day with historical search available for the past 60 days.
+Example: Get the volume data from the last 7 days using 12hs of time slice.
+
+```javascript
+var watson = require('watson-developer-cloud');
+
+var alchemy_data_news = watson.alchemy_data_news({
+  api_key: '<api_key>'
+});
+
+var params = {
+  start: 'now-1d',
+  end: 'now'
+};
+
+alchemy_data_news.getNews(params, function (err, news) {
+  if (err)
+    console.log('error:', err);
+  else
+    console.log(JSON.stringify(news, null, 2));
+});
+```
+
 ## IBM Watson Services
 The Watson Developer Cloud offers a variety of services for building cognitive
 apps.
@@ -598,6 +649,9 @@ See [CONTRIBUTING](https://github.com/watson-developer-cloud/nodejs-wrapper/blob
 
 [alchemy_language]: http://www.alchemyapi.com/products/alchemylanguage
 [sentiment_analysis]: http://www.alchemyapi.com/products/alchemylanguage/sentiment-analysis
+[alchemy_vision]: http://www.alchemyapi.com/products/alchemyvision
+[alchemy_data_news]: http://www.alchemyapi.com/products/alchemydata-news
+
 [wdc]: http://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/
 [bluemix]: https://console.ng.bluemix.net
 [npm_link]: https://www.npmjs.com/package/watson-developer-cloud

examples/alchemy_data_news.v1.js

@@ -0,0 +1,19 @@
+'use strict';
+
+var watson = require('watson-developer-cloud');
+
+var alchemy_data_news = watson.alchemy_data_news({
+  api_key: '<api_key>'
+});
+
+var params = {
+  start: 'now-1d',
+  end: 'now'
+};
+
+alchemy_data_news.getNews(params, function (err, news) {
+  if (err)
+    console.log('error:', err);
+  else
+    console.log(JSON.stringify(news, null, 2));
+});

examples/alchemy_vision.v1.js

@@ -0,0 +1,19 @@
+'use strict';
+
+var watson = require('watson-developer-cloud');
+var fs = require('fs');
+
+var alchemy_vision = watson.alchemy_vision({
+  api_key: '<api_key>'
+});
+
+var params = {
+  image: fs.fs.createReadStream('src/test/resources/obama.jpg')
+};
+
+alchemy_vision.getImageKeywords(params, function (err, keywords) {
+  if (err)
+    console.log('error:', err);
+  else
+    console.log(JSON.stringify(keywords, null, 2));
+});

services/alchemy_vision/v1.js

@@ -108,7 +108,7 @@ AlchemyVision.prototype.imageLinks = function(_params, callback ) {
 /**
  * Tags image with keywords
  */
-AlchemyVision.prototype.imageKeywords = function(_params, callback) {
+AlchemyVision.prototype.getImageKeywords = function(_params, callback) {
   var params = _params || {};
   var accepted_formats = Object.keys(endpoints['image_keywords']);
   var format = helper.getFormat(params, accepted_formats);