updated Combine_Surfaces, minimum value=1
added rescale to 1 option to Combine_Surfaces
started updating GA.prep
added RasterStack option to GA.prep
updated example data
fixed bug GA.prep
updated vignette
updated data and vignette
Combine_Surfaces minimum=0
CS.prep can now accept raster point grid
Full incorporated .asc file for spatial locations, Combine_Surfaces minimum = 1
updated package: 2.0-3
Merge branch 'MSoptim_mod'