Site Upgrade: Comment Followup Notification And Styling

I made two upgrades to the comment system this morning.

I completed a Drupal Development mission called "Email notification upon replies to your nodes and comments so you can follow threads and respond".

Now when someone replies to your comments, you get an email so you can continue the conversation!

I'm not sure if you get an email when someone replies to your node in the first place yet though. Comment here to test this new feature. 

I also gave comment headers a light blue background to make it easier to see which reply buttons replied to which comments.