GPfit v1.0-0 (Release date: 2015-04-01)
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Changes:

* Housekeeping changes only: added inst/CITATION file and NEWS file, including retroactive listing of changes
* Version number coincides with publication of JSS paper (see references).

GPfit v0.2-1 (Release date: 2014-09-03)
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Changes:

* fixed bug in predict() for the Matern correlation function


GPfit v0.2-0 (Release date: 2014-06-24)
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Changes:

* Matern correlation function added to corr_matrix()
* In corr_matrix(), Gaussian correlation generalized to power exponential.
* Power exponential correlation with power=1.95 is now default for corr_matrix() and thus for GP_fit.
* Iterative approach to selecting the nugget implemented in predict.GP().
* In GP_fit(), the argument optim_start was added, to allow user-specified initial parameter values for optim(), in addition to those generated automatically.

GPfit v0.1-0 (Release date: 2012-08-09)
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* Initial release
