title: how to add a push notification system like on stackoverflow (red number notification) in my rails 3 app?
body: <p>I want to add a push notification pop-up like you see on stackoverflow. When a user comments you get a notification. I want to implement something similar on my rails 3 app. Is there a good gem for that? I saw other threads but they mention either the mailboxer or public activity gem. I don't think that's what I'm looking for. </p>