docs(guide): add new resource links

Added a link to 10 reasons to use and online courses for Angular

Closes #6194

Author: JeremyLikness

docs/content/guide/index.ngdoc

@@ -13,6 +13,7 @@ Everything you need to know about AngularJS
 
 * {@link tutorial/index Official AngularJS Tutorial}
 * [10 Reasons Why You Should Use AngularJS](http://www.sitepoint.com/10-reasons-use-angularjs/)
+* [10 Reasons Why Developers Shold Learn AngularJS](http://wintellect.com/blogs/jlikness/10-reasons-web-developers-should-learn-angularjs)
 * [Design Principles of AngularJS (video)](https://www.youtube.com/watch?v=HCR7i5F5L8c)
 * [Fundamentals in 60 Minutes (video)](http://www.youtube.com/watch?v=i9MHigUZKEM)
 * [For folks with jQuery background](http://stackoverflow.com/questions/14994391/how-do-i-think-in-angularjs-if-i-have-a-jquery-background)
@@ -113,6 +114,7 @@ This is a short list of libraries with specific support and documentation for wo
   [Pluralsite (3 courses)](http://www.pluralsight.com/training/Courses/Find?highlight=true&searchTerm=angularjs),
   [Tuts+](https://tutsplus.com/course/easier-js-apps-with-angular/),
   [lynda.com](http://www.lynda.com/AngularJS-tutorials/Up-Running-AngularJS/133318-2.html)
+  [WintellectNOW (4 lessons)](http://www.wintellectnow.com/Course/Detail/mastering-angularjs)
 * **Paid onsite:**
   [angularbootcamp.com](http://angularbootcamp.com/)