review Opera's submission: DOM XPath
Merge pull request #449 from w3c/deniak/opera-xpath

review Opera's submission: DOM XPath
tests already moved in /html/dom/dynamic-markup-insertion/document-write
tests already moved to /html/dom/dynamic-markup-insertion/document-write
clean up
Merge pull request #450 from w3c/deniak/opera-documentwrite

clean tests from old-tests/submission/Opera/documentwrite