adding accuracy metric function to main script and testing

mosaicing function adding function to produce accuracy metric surface from tile RMSE

testing extent macthing option for region 4

adding extent option to main global mosaicing script

modifying python merge mosaicing option

adding match extent option to mosaicing

testing removal of matching for python part of script

wrapper function for python option in mosaicing files

mosaicing function adding python and R options to mosaicFile

testing plotting of mosaics