Venus merge request: improved xpath_sifter example

[Mary Gardiner]

On Sun, Apr 20, 2008, Sam Ruby wrote:
> Filters listed in the [planet] section apply to every feed in the 
> planet.  Filters listed in an individual feed section only apply to that 
> feed.  Patches to the documentation to make this clearer would be 
> gratefully accepted.

I'll have a look later in the week, in the meantime I updated my
examples/filters/xpath-sifter/xpath-sifter.ini file.

It can be merged from the same place as before:
http://users.puzzling.org/users/mary/bzr/venus/branches/venus-xsltdoc/

-Mary