Update README.md

Author: antoniolg

README.md

@@ -6,3 +6,5 @@ MVP Android Example used to explain how to use this pattern in our Android apps.
 [Android MVP @ antonioleiva.com (English)](http://antonioleiva.com/mvp-android)
 
 [Android MVP @ LiME Creative Labs (Spanish)](http://www.limecreativelabs.com/mvp-android/)
+
+[![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-androidmvp-brightgreen.svg?style=flat)](https://android-arsenal.com/details/3/1514)