UPDATE: In addition to the gameplay footage, the conference started with a computer generated trailer of Skyward Sword. You can see both the gameplay footage and the trailer after the jump. Tonight Nintendo announced some sweet new details for The Legend of Zelda Skyward Sword. Besides the Japanese release date being confirmed (November 23rd, 2011), along with the Japanese box art, we found a few unannounced items in the presentation. The Bug net, a tool used for capturing bugs which…