Readme.md in minitel-0.2.0 vs Readme.md in minitel-0.3.0

@@ -2,5 +2,23 @@
 A 𝕋𝔼𝕃𝔼𝕏 client
 
 [![Gem Version](https://badge.fury.io/rb/minitel.svg)](http://badge.fury.io/rb/minitel)
 [![Build Status](https://travis-ci.org/heroku/minitel.svg?branch=master)](https://travis-ci.org/heroku/minitel)
 
+## Usage
+
+``` ruby
+require 'minitel'
+# create a client
+client = Minitel::Client.new("https://user:[e-mail]")
+
+# send a notifcation to the owner and collaborators of an app
+client.notify_app(app_uuid: '...', title: 'Something happened', body: 'here are the details')
+# => {"id"=>"uuid of message"}
+
+# send a notifcation to a user
+client.notify_user(user_uuid: '...', title: 'Something happened', body: 'here are the details')
+# => {"id"=>"uuid of message"}
+
+# add folloup to a previous notificaiton
+client.notify_user(message_uuid: '...', body: 'here are even more details')
+```