Along with a host of other updates this week, Apple shipped new versions of Keynote for both Mac (version 6) and iOS (version 2), and also added new features to the Keynote Web app available on iCloud.com. Here are some first impressions:Flatter lookThe new versions of Keynote adopt the flatter iOS 7 design language, with mostly two-dimensional controls and limited use of color (especially in iOS). Perhaps the most striking change in the Mac version is that the floating palettes are gone: Everything now happens in a single window by default (although you can still bring up a few of the floating palettes if you really want to). And yet, remarkably, Apple managed to make that window feel less cluttered than before without reducing the number of features. I may feel differently after working with it for a while, but so far I'm pleased with the cleaner layout; my slides