Adds remapping of boundary data

boundary-data-remapped/bc_land_frac_11pfts_1976.r360x180.nc

boundary-data-remapped/bc_sic_1979_2008.ymonmean.r360x180.nc

boundary-data-remapped/bc_sst_1979_2008.ymonmean.r360x180.nc

...ata-remapped/icon_grid_0013_R02B04_G.selgrid4.r360x180.nc

boundary-data-remapped/remap-boundary-data.sh

boundary-data-remapped/screenshots/bc_land_icongrid.png

boundary-data-remapped/screenshots/bc_land_remapped.png

boundary-data-remapped/screenshots/bc_sic_remapped.png

boundary-data-remapped/screenshots/bc_sst_remapped.png

...dary-data-remapped/screenshots/grid_cellarea_remapped.png