New snapshot gstat sources

["Edzer J. Pebesma" <edzer@pangea.Stanford.EDU>]

Hi all,

I uploaded a new snapshot of my sources of gstat 2.1.1, at
http://www.geog.uu.nl/gstat/bin/gstat-2.1.1.tar.gz

It includes:

- normal score transformation of data, using for example:

  data(zinc): 'zinc.eas', x=1, y=2, v=3, nscore='ns.eas';

  this will write the normal score table to the file `ns.eas' and
  transform the data. Unlike GSLIB, tied data (data with equal
  measured values) come out as equal normal scores, thus disturbing
  the supposed `exact' Gaussian distribution. I transformed average
  ranks for tied data. Nothing is transformed back.

- PNG support (gstat -e map2png) now replaces GIF support (visit
  http://www.boutell.com/gd/ to see why). Added some colour palettes.

- support of GSLIB grids (GSLIB v. 2, page 22) -- note that I hardly
  tested this functionality. Only grids with 1 z-layer and equal x-
  and y-spacing are supported, of course. gstat -e convert should
  work.

- fitting of power variograms should now work (this used to be broken).

That's it for now.
--
Edzer