w3c/unicode-xml

over 400 validation errors fixed, mostly to do with presentational markup
several broken links patched
publication data updated
(The published version contains a note about the status of the document. It was removed from this github version.)

from Richard Ishida in private mail.

<span style='font-style: italic;'>hello</span>.
Also adding character names and using <code> for code.
This also serves as a first trial commit to push to github.

Removed the Versioning section and Copyright section at the end of the document, since these were throwbacks to the joint publication between Unicode and W3C.
Replaced the Changes section with something simpler and added link to Github commits list.

a lot of (but not all) presentational markup converted to semantic