FUSION, adding option to use same proportion of training for fusion and gam

FUSION, comparison to GAM models using the same testing and training data

FUSION, using GAM for bias surface, correction aspects

FUSION, training and testing for year 2010 read from the GHCND database

FUSION, modifications saving plots and adding GAM models for delta surface

Initial modification by Benoit-adding testing points for 10 dates

Initial commit: first fusion code from Brian

OR data preparation, initial commit for extraction of covariates from raster stack

OR data preparation task#363, modified code for ghcn to create a shapefile

GHNCD station data selection using Postgres database, initial commit, task #363