A life-size “slice” of the planned exterior of Apple’s under-construction Campus 2 has popped up in Gundelfingen, Germany, reports German enthusiast site iFun.de. Pictured posted on the site show two stories of the expected four- or five-story (above ground) structure, which will be built as a massive ring-like office building with a large natural area in the center. The segment was likely created to test the materials chosen for the building’s exterior….