Method comp part1 -task#491, major clean up, production of boxplots and visual maps

Initial commit-task#491-methods comparison part 1: kriging, GAM, GWR, FUS, CAI

Accuracy and spatial distance to closest fitting stat., intial commit task #491

Multi sampling kriging raster prediction, initial commit, task #491

Multisampling Kriging function interpolation initial commit raster prediction task #491

Method comparison initial commit task #491

GAM FUSION, multi sampling function initial commit

GAM FUSION, multi sampling accuarcy assessment main script initial commit

GWR, raster pred. modification model 8, function

GWR, modification of code for model 8, raste prediction