KhronosGroup/WebGL — pull request #35 by bjacob (2012-09-21 17:10:13+00:00)
Title: Move ATC and PVRTC to draft status, with numbers 12 and 13 respectively

Notice that some existing proposals already use numbers 12, 13, 14. I thought that numbers would be attributed on a first-draft, first-served basis, to avoid having discontinuities in the numbers of draft/official extensions, but up to you.