Twitter has updated its official iOS app, adding a streamlined posting process that previews tweets before they are published, as well as a wider timeline that makes better use of the iPhone's screen real estate. On the official Twitter blog, the company boasts that photos can be tweeted in the new app in under six seconds. Photos: When you add a photo to your Tweet, you’ll see a full preview of your photo, not just the cropped version. We’ve also redesigned the experience to make it easy to share a photo from your camera roll: simply click the photo icon on the bottom right corner of the Tweet box. With fewer steps needed to share photos, you can more
