Add xz to docker image

See merge request !36

Merge Feature g19 into develop

See merge request !35

(cherry picked from commit cc04d47a)

Co-authored-by: Levi Pfantz <lpfantz@wisc.edu>

add support for stats files

See merge request !31

add our regression test suite to the repo via pytest

Closes #29

See merge request !30

add a test suite to the repo via pytest, and fix some minor bugs in _minute_gridder.py uncovered by the test rewrite

use an updated commit of glmtools that handles empty data scenes

Closes #38

See merge request !29

replace exits with raises in grid_setup, and remove the realtime check

See merge request !28

add a simple try/catch for each minute so that a single minute's failure doesn't impact other minutes

move the handling of each minute into its own function - grid_minute() - which can then be try/catch'd or potentially run in parallel

Mambaforge already has mamba installed, so this was unnecessary. In addition, it was causing builds to fail due to an incompatibility between mamba & conda versions. Related ticket: https://github.com/mamba-org/mamba/issues/1706

ensure --ctr-lat and --ctr-lon are valid latitudes & longitudes

See merge request !27

group inputs by minute and process accordingly

See merge request !26