Add screencast GIF

README.md

@@ -4,6 +4,8 @@
 
 Developed for the all-new [Basecamp 3](https://basecamp.com/3/), Turbolinks 5 is a complete rewrite that adds support for iOS and Android hybrid applications. This preview release is API-stable, but [official documentation](https://github.com/turbolinks/turbolinks/tree/docs#readme) remains a work in progress.
 
+<img src="https://cloud.githubusercontent.com/assets/2603/12760305/618836a6-c9ab-11e5-933e-c15f056ce956.gif" width="888" height="423" alt="Turbolinks: Browser, iOS, and Android">
+
 #### Quick Installation for Rails Applications
 
 1. Add the `turbolinks` gem, version 5, to your Gemfile: `gem 'turbolinks', '~> 5'`