13.dec 2004
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- if devi is not given rmsi computation is skipped
- segmentation needs to be checked whether all fixes were incorporated
- reading if z is attribute leads to swapping for large data sets
- crossvalidation needs improved efficiency
- add crossvalidation to description
- remove the dmax option
- change error message if segment is smaller than grid cell (in data.c)

old notes
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- it says ...identical points instead of
           ....point closer than given dmin (or whatever we have in s.surf.tps)

- check whether masking works

- test variable smoothing