Changed the threshold for crefl files where everything 16000 and above is now considered a fill value. Also allowed for Non-terrain corrected files with VIIRS CREFL.
Updated crefl code to use 16000 as a valid data point (assuming new patched version of crefl).
Upped version of polar2grid.crefl to 1.0.1.
Added vendor CREFL C code. Modified their directory structure so it had less cruft.
Updated cviirs.c to v2.0
Updated cviirs.c to v3.0
Updated cviirs.c to v3.1
Updated cviirs.c to my patched version of v3.1. This fixes the bug where SDR fill values were ignored.
Made a Makefile to make compilation/installation of CREFL much easier.
Bash scripts still need work so that they work either generically or with POLAR2GRID_HOME environment variable.
Added information to CVIIRS readme. Added permission changes to programs in Makefile. Added a little flexibility with the PATH in the run script.
Merge branch 'viirs_crefl_nontc' into develop