subsampling script, major modifications to solve issues related to North America runs

data preparation script, modifications to solve subsampling issue in North America

data preparation adding subsampling for daily stations

run 10 assessment of reg2 and reg6 with generation of mosaics for 1000x3000

NEX assessment minor changes

run 10 NEX assessement generation of mosaics images and automated copy back to server

run 10 NEX assessment generation of mosaics figures for reg4, reg5, reg2

NEX assessment part1, region 2 assessment with mosaics

run 10 NEX assessment part 2, visualization of mosaics for region 4 and region 5

run 10 NEX assessment part 1 region 5 mosaics