improved shade.rel.sh

[Simon Cox]

I have put an "improved" version of shade.rel.sh in "incoming".  This
allows you to specify a "vertical exaggeration factor" for those times when
your cell values are not in the same units as your map units (eg lat-long,
gravity data, rainfall, etc)

Simon Cox

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Dr Simon Cox                          __  \
CSIRO Exploration & Mining         ,~'  L_|\    Australian
39 Fairway, PO Box 437,         ;-'         \   Geodynamics
Nedlands, WA  6009  Australia   (            \  Cooperative
      Phone +61 9 389 8421      +    ___     /  Research
      Fax   +61 9 389 1906       L~~'   "\__/   Centre
s.cox at dem.csiro.au                         W
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