Web Applications 1.0 r6956 Tweak the wording per chair decision.Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=12490

Add a description of Web Applications 1.0 r6956 Tweak the wording per chair decision.Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=12490