Updates README with new Wrecker badge. The old one broke, since we had to delete and re-create the Wercker app when changing the repo name (it was stuck pinging an old webhook URL, and Wercker doesn't let you change an application's repo for some reason).
Changes
Updates README with new Wrecker badge. The old one broke, since we had to delete and re-create the Wercker app when changing the repo name (it was stuck pinging an old webhook URL, and Wercker doesn't let you change an application's repo for some reason).
:cactus: