Merge pull request #1497 from alesegdia/master

adding article to learn AngularJS in spanish

free-programming-books-es.md

@@ -20,6 +20,7 @@
 * [Git](#git)
 * [Haskell](#haskell)
 * [JavaScript](#javascript)
+    * [AngularJS](#angularjs)
     * [D3](#d3js)
     * [jQuery](#jquery)
     * [node.js](#nodejs)
@@ -171,6 +172,10 @@
 * [Jardín de JavaScript](http://bonsaiden.github.io/JavaScript-Garden/es)
 
 
+#### AngularJS
+* [Cómo aprender AngularJS](http://raulexposito.com/documentos/como-aprender-angularjs/)
+
+
 #### D3.js
 * [Tutorial de D3](http://gcoch.github.io/D3-tutorial/index.html)