Added VIIRS SST to VIIRS frontend, rescaling configs, and AWIPS configs for 211e.
Updated VIIRS SST scaling and added other AWIPS grids for VIIRS SST.
Updated VIIRS SST in AWIPS to mimic MODIS SST.
Added VIIRS SST mask from QF1 flag.
Merge branch 'viirs_sst' into develop

Conflicts:
	py/polar2grid/polar2grid/awips/awips_grids.conf
	py/polar2grid_core/polar2grid/core/rescale_configs/rescale.8bit.conf