Ignore tests known to have invalid markup.
Ignore test 114 (intentionally invalid).
Ignore test 0131 (char. ref expanded to CR char).
Ignore test 0109 (intentionally invalid).
Ignore test 0180 (prefix intentionally invalid).
The rel values in test 0087 are not valid HTML5.
"describedby" & "role" are not valid rel values.
a@src is not valid in HTML5.
Arbitrary values for "rel" are invalid in HTML5.
"homepage" is not a valid rel value in HTML5.
xmlns:foaf is not valid in HTML5.
An xsd:duration is not a valid HTML5 datetime.

A "valid duration string" in HTML5 must not include a year or month;
e.g., it must be "P28DT00H00M00S" instead of "P2011Y06M28DT00H00M00S".
Remove test with known invalid datetime value.
Merge pull request #4 from sideshowbarker/invalid

Invalid