update satpy hash to post-https://github.com/pytroll/satpy/pull/1548, with support for modifying the environment prefix

Resolve "make error messages more descriptive"

Closes #8

See merge request !11

add license text to all CSPP Geo GGLM code

Closes #16

See merge request !9

update PACKAGE_README.md for beta1

Closes #18

See merge request !10

make our help text return the name of the script that was actually called

Closes #19

See merge request !8

Resolve "integrate trio picker with the main script, as an option"

Closes #17

See merge request !7

Resolve "add tracability attributes to grid (and maybe tile) files"

Closes #3

See merge request !6

write a conda environment.yml to the python_runtime/ folder so that we can more easily audit what's included in our runtime between builds

2020 02 10 beta1 high priority

Closes #14 and #9

See merge request !5

add compression to the tiles produced by satpy. also gets us other satpy updates like the static scaling factors. (fixes #14)

add an example usage message and switch to using RawTextHelpFormatter so that the newlines are preserved in our description (#11)

This PR grew a bit beyond just adding satpy to our buildbucket!

See merge request !4

https://github.com/deeplycloudy/glmtools/commit/caa7d5af4a27060c56258c9bf73fa6a13891b0e1