Twitter's been rolling out a number of changes lately, many resulting in negative reactions, but it looks like one feature long-requested by users is just around the corner: the ability to download all of your past tweets. Twitter CEO Dick Costolo spoke today at a conference for the Online News Association, and was asked when the ability would be coming to Twitter. According to both Alex Howard and First Post, Costolo replied that it would be arriving by the end of the year.[Source: The Verge]