Mark Zuckerberg, update your status — as world’s sixth-richest person. That’s what Bloomberg reports as the Facebook CEO’s net worth grew Thursday to $47.5 billion. The top spot belongs to another nerd, Bill Gates, worth $78 billion. The Microsoft founder is trailed by Spanish fashionista Amancio Ortega ($69.7 billion), Berkshire Hathaway investor Warren Buffett ($59.4 […]