Async Notifications! — Cards and Castles Steam update #256005

Hey folks, quick update: basic asynchronous notifications are now working with Steam! While we intend for async games to be a more mobile oriented feature, we are supporting them in the Steam build too for cross-platform compatibility. Yay! We've also improved our social features; friend invites now require confirmation from the other player, so you know when someone wants to be your friend. You can also now instantly challenge a friend to a match through the Friends menu on the main screen, and a little green icon will show how many of your friends are online! That's it! More Steam features coming soon, and don't forget Warlock Academy card expansion launches on the 22nd! :D