The dev folk over at Tapbots have just unleashed a major overhaul to their famed Twitter client. Tweetbot 2.0 not only sees the addition of a few new traits and a design refresh, but it's also on the receiving end of some welcomed iPad compatibility (iOS 5 only). Though, it's worth mentioning the app isn't universal -- so you'll have to cough up three bucks for the slate variant, even if you've already got the iPhone edition. Amongst the new goodies is a renovated timeline view with pic thumbnails, an optional New Tweets bar, auto-refresh, and a one-tap system ...