Feature/doctype html5 Closes #8

I have done some stupid shit with git to make this pull request because I gitted bad. Michael, if you care about the history, you might want to unmongle this thing.  If you can tell me how you did it that would be nice.

Anyways, the reason I made a pull request is because I changed the spec for issue #8 (doctype-html5) a bit, and wanted to make sure someone would okay that.