HTML5 Notifications on Builds
Have HTML5 notifications for when builds finish. We can't do that in a step, as it's server side, but it would be very handy to have. Probably need to be a user setting though.
Then I can leave wercker on a tab in the background, and as I'm working, I can be notified if the last build passed / failed on my screen without having to switch over to email / chat.