Issues/32 - Can automatically find template based on pointing, sca, band or image_path

[wmwv]

Adds the ability for the following three to work.

Closes #32

python detect_supernova/pipeline.py --pointing 53526 --sca 1 --band R062 --template-pointing 5044 --template-sca 8 --template-band R062 -o /dia_out_dir

python detect_supernova/pipeline.py --pointing 53526 --sca 1 --band R062 -o /dia_out_dir

or just by passing the image path

image_path=/dvs_ro/cfs/cdirs/lsst/shared/external/roman-desc-sims/Roman_data/RomanTDS/images/simple_model/R062/53526/Roman_TDS_simple_model_R062_53526_1.fits.gz
python detect_supernova/pipeline.py --science-path ${image_path} -o /dia_out_dir

The functions that support this are all in util.py, which could be moved to snappl in the future.

[wmwv]

@chernya4 Could you verify that you can run the examples in the README.md in this PR?
@laldoroty What do you think of this design? Which of the util.py functions would be useful to move to snappl?

[laldoroty]

I think it looks great. Though I think that all/nearly all of utils.py would make sense in snappl? It seems like it's largely image metadata retrieval with some OpenUniverse stuff baked in. This would help keep OU invisible to detect_supernova/sidecar.

[wmwv]

Agreed, all of util.py should go into snappl.