Updated iXML grammars for QT4 grammars

Updated current grammars for XPath4 and XQuery4 in iXML are available 
fromhttps://github.com/johnlumley/jwiXML/tree/main/QT4Grammars 
Additional grammars for XSLT patterns, XQuery Update and XQuery Fulltext 
have been added. (These grammars now use the repetition-with-separator 
operators (++, **) of iXML.)

Please note there have been minor alterations on the file names of the 
grammars (dropping the .extracted portion)

-- 
*John Lumley* MA PhD CEng FIEE
john@saxonica.com