Vignettes and other documentation

Vignettes from package 'gradientForest'

gradientForest::biodiversity-survey

Biodiversity example

Other files in the doc directory

	GZ.phys.grid.Rdata
	GZ.phys.site.Rdata
	GZ.sps.mat.Rdata
	biodiversity-survey.bib
	gf.Rdata