cc Drop xml:id instances from some test cases.
cc Bring old <figure> test case up to date.
cc Reduce invalid test case to just one error.
cc Minor editorial tweak to <object> test.
cc Updated figure test.
cc Updated figure tests.
cc Moved a bunch of XHTML files.
cc Added <meta charset=utf-8> to many HTML files.
cc Removed unnecessary U+FEFF from test document.
cc Removed crufty RDFa test.
cc Updated xhtml tests for non-empty iframe.
cc Checkpointing messages.json file.