add gif to demonstrate

README.md

@@ -3,6 +3,8 @@ sync.js let's you keep your remote files in sync with your local copy. Whenever
 
 When configured correctly, it works really fast because sync.js leverages [openSSH master connection settings](http://protempore.net/~calvins/howto/ssh-connection-sharing/). That means instead of creating new connections for each upload, sync.js keeps one connection open and uses it for all uploads.
 
+![How it works](http://i.imgur.com/weaaKqh.gif "How it works")
+
 ### Why did I do this? Aren't there already tools doing the same exact thing?
 Yes there are. However, none of them fulfills my needs. I use Sublime Text 2 and occasionally VIM. ST2 has `SFTP` plugin 
 ~~but it doesn't have ST3 support yet~~, also it doesn't upload files when they changed via other editors.