running gam daily multiple holdout 10-70% every 2 days for single time scale paper

adding option for running every n days in a year and running kriging daily holdout 10%-70% every 2 days

modifications for paper draft, single time scale method

analyses multi-time scale part 5, examining results with covariates in daily deviations

modification validation script following changes in daily deviation options

running gam_CAI with gam and DISTOC for daily deviation surface

validation script check and slight modifications to handle modifications in daily deviations

modificatons for multi-time scale methods, adding gam,gwr,kriging options for daily deviation surfaces

first modifications to add interpolation methods and covaratiates options for daily deviation surfaces

Merge branch 'bp/interp' of code.nceas.ucsb.edu:environmental-layers into bp/interp