It’s hard to believe that nearly three years have passed since we wrote about Tumult’s original release of Hype, a web design program that eased the process of creating HTML5 alternatives to Adobe Flash pages. These days, Tumult’s selling a much-improved sequel called Hype 2.5 ($30), which is available through the Mac App Store. The new Hype can create HiDPI/Retina-ready pages, as well as pages laid out with “springs and…