Hey there, Kindle Fire owners – Amazon’s rolling out a brand new software update for you, and it packs quite a few worthwhile (and arguably overdue) tweaks for your budget-conscious tablet.Take sharing, for example. Oddly absent from the Kindle Fire at launch was the ability to share interesting snippets of text like its e-ink brethren, but that functionality has been added, along with the ability to tap into Amazon’s people-powered Shelfari service for what the company calls Book Extras – extra related information pertaining to the book a reader is poring through.