Eye-tracking technology on Android devices isn't exactly anything new, but Danish startup The Eye Tribe is now looking to broaden its use further with its own new set of tools. The company has been showing off its tech since last year, but it's taken advantage of this week's DEMO Mobile conference to officially launch it, and reveal that its SDK will be available to developers this June (they can sign up now if they're interested). As for the tech itself, it promises to allow for everything from eye-activated logins to