Support for multiple outputs in GRDDL.py client

As I mentioned at last week's telecon, I slightly modified the GRDDL.py
client to try to work towards resolving issue `faithful-infoset`[0].  If
you provide an argument to the `--no-xi-filename` option in the patched
GRDDL.py, then GRDDL.py will perform two gleanings; the results of
gleaning with XInclude resolution will be sent to standard output, and
the results of gleaning without XInclude resolution will be sent to the
file identified by this option.  How do you think we can best move
toward resolution of this issue from here?

[0] See the second item after
<http://www.w3.org/2004/01/rdxh/spec#issue-mt-ns> (which could probably
use an ID).

Take care,

    John L. Clark  |  Systems Analyst
                   |  Cardio-Thoracic Surgery Research
 Cleveland Clinic  |  9500 Euclid Ave.   |  Cleveland, OH 44195
                   |  (216) 445-6011

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