Following today’s iPad event, Apple has released iOS 5.1 for the iPhone, iPad and iPod touch. According to the release notes, the new version adds Japanese language support for Siri and the ability to delete photos from the Photo Stream. Additionally, the Camera shortcut is now always visible on the lock screen for the iPHone 4S, iPhone 4, iPhone 3GS and fourth-generation iPod touch and improvements have been made to camera face detection to…