HTML5 differences from HTML 4

as HTML5 finally gets nailed to the floor it may be worth creating a
version of the HTML differences from HTML 4[1] doc that actually reflects
the differences between html5 and html 4 and references the HTML5 spec
rather than the whatwg spec.

lets call, it HTML5 differences from HTML 4

digest idea at leisure, if there are no objections and if no one else wants
to edit I will do it


[1] https://rawgit.com/whatwg/html-differences/master/Overview.html
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Regards

SteveF
HTML 5.1 <http://www.w3.org/html/wg/drafts/html/master/>