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

run 10 NEX part 2 assessment

run 10 NEX assessment part 1, 1500x4500 tiles

run 9 NEX, part 2 assessment of accuracy, cleaning up and adding figures

run 9 NEX assessment 75% overlap for 1000x3000

subampling added to Database preparation script for NEX run

adding documentation and debugging subsampling function for NEX fun