Add an article about Redux Saga

Author: gaearon

docs/introduction/Ecosystem.md

@@ -32,6 +32,7 @@ On this page we will only feature a few of them that the Redux maintainers have
 * [Getting Started with React, Redux, and Immutable](http://www.theodo.fr/blog/2016/03/getting-started-with-react-redux-and-immutable-a-test-driven-tutorial-part-2/) — A test-driven intro to refactoring a React app to use Redux
 * [Secure Your React and Redux App with JWT Authentication](https://auth0.com/blog/2016/01/04/secure-your-react-and-redux-app-with-jwt-authentication/) — Learn how to add JWT authentication to your React and Redux app
 * [Understanding Redux Middleware](https://medium.com/@meagle/understanding-87566abcfb7a#.l033pyr02) — In-depth guide to implementing Redux middleware
+* [Build an Image Gallery Using Redux Saga](http://joelhooks.com/blog/2016/03/20/build-an-image-gallery-using-redux-saga) — An intro to using Redux with Redux Saga
 * [Angular 2 — Introduction to Redux](https://medium.com/google-developer-experts/angular-2-introduction-to-redux-1cf18af27e6e) — An introduction to Redux fundamental concepts with an example in Angular 2
 * [Working with VK API (in Russian)](https://www.gitbook.com/book/maxfarseer/redux-course-ru/details) — A tutorial in Russian that demonstrates creating an app that consumes VK API