testing code on NEX with python mosaicing script from Alberto

more modifications to mosaicing function

script mosaicing function, adding raster accuracy metric funtion

running mosaicing script for accuracy metric mosaic, clean up

testing accuracy metric function and mosaic

creating function to produce accuracy metric raster for eact tile

modifications for RMSE mosaicking first changes

checking mosaicing script for South America 1992 predictions

running assessment part2 South America

running assessment part1 for South America 1992, major changes in code