Rovio today announced a new version of its popular Angry Birds game after hinting about it yesterday on Twitter. The upcoming Angry Birds Stella features the "fierce and feisty" female lead character, Stella, along with her "friends and (fr)enemies." Angry Birds Stella will open a door to a part of the Angry Birds universe you've never seen before! There will be plenty of fun and adventure, but the bunch of passionate pals will also have to deal with some serious i