New in Version 0.7-3 (compared to 0.7-2):
------------------------------------------------------------------
- vignette adjusted (old LaTeX 2.09 commands replaced)
- kernel.constants revised (works now with arbitrary dimension d)

New in Version 0.7-2 (compared to 0.7-1):
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- stability changes in 'glm.lld', 'glm.link', 'kgplm', 'sgplm1'
- 'bandwidth.scott' added for rule-of-thumb bandwidth choice
- updated implementation of 'kernel.function', 'kernel.constants'
  and the kernel C-function in kernconv.c
- vignette added (introduction to estimation, set of examples)

New in Version 0.7-1 (compared to 0.65):
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- package renamed to gplm for publication on CRAN
- call to columnwise sd updated acc. to R-3.0.0

New in Version 0.65 (compared to 0.62):
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- new function 'sgplm1' for spline-based GPLM estimation (just for
  1-dimensional nonparametric component functions)
- df (approximate degrees of freedom) added in 'kreg', 'kgplm'
- aic (Akaike's information criterion) added in 'kgplm'
- function 'kbackfit' added for backfitting
