Facebook has offered photo sharing in one form another since shortly after the site's launch, but while certain features have been added over the years, such as tagging and downloads, image formatting has remained mostly unchanged. Until today. Facebook has announced that it will roll out a new tool for thumbing through galleries across the site, presenting photos in a new square format with the option to "highlight" certain shots to increase their footprint on the page. Google+ users may recognize the format, which bears some resemblance to the tool on th