gam day, testing covariates combination with nesting and ti() for paper Oregon

gam fusion handling errors

covariates preparation, dealing with projection shift and keeping track of covariates names after screening

gam day with screening of values, OR analyses for paper

testing screening using GAM predictions in Oregon

covariates, fixing screening function to remove extreme values

adding function to define projection system

covariates production function, adding screening for extreme values

master script adding arguments to screen covariates

results output script, modifications to output graphs for added methods: gam_daily, gwr_daily, kriging_daily