Included some warning/errors to ignore

These changes saved me from annoying html error/warning messages, maybe you are interested to include them

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In today's html editing, almost nobody writes a "pure" html code
(complete, i mean), with body, title, etc... most of people uses CMS's
and similar things, which means that the html is just a "piece" of html
and not the entire structure, the changes on this branch are meant to
ignore those annoying warnings

The last line is for structures that includes the "&" character, like in
those kind of cases: < a href="http://foo.bar/something.php&value&something&foo" >