README.md in mailkick-0.0.4 vs README.md in mailkick-0.0.5

@@ -127,11 +127,11 @@
   Mailkick::Service::Sendgrid.new(api_key: "API_KEY"),
   Mailkick::Service::Mandrill.new(api_key: "API_KEY")
 ]
 ```
 
-## Multiple Lists
+## Multiple Lists [beta]
 
 You may want to split your emails into multiple categories, like sale emails and order reminders.
 
 Set the list in the mailer.
 
@@ -174,9 +174,14 @@
 
 More great gems for email
 
 - [Roadie](https://github.com/Mange/roadie) - inline CSS
 - [Letter Opener](https://github.com/ryanb/letter_opener) - preview email in development
+
+## TODO
+
+- Make it easy to customize controller
+- Subscribe to events
 
 ## Reference
 
 Change how the user is determined