GAM with global slope overcorrects in many areas, will now explore focal gam with spatial params

attempting gam to remove bias

adding initial bias correction function

updating postprocessing to produce netcdf rather than geotif

updating figures

rearrange MOD09 folders

Rearranging files

Merge branch 'aw/precip' of code.nceas.ucsb.edu:environmental-layers into aw/precip