[XQZone General] Updated version of "vi" syntax file

[Raffaele Sena]

You can get a new version here: http://xq.aromatic.org/

I fixed the bugs that Ron complained about ( numbers in identifiers and 
')' in comments :)
There is still a problem with keywords in strings (they get highlighted 
as keywords) but that will have to wait
(then I know somebody will complain that "for $for in in where where 
return $return" doesn't highlight correctly :)

Enjoy!

-- Raffaele