Convert from pysis to kalasiris and rewrite of spatial/isis.py (#573)

* test(change_detection): Added tests for the functions which call out to ISIS.

* refactor(change_detection): Converted pysis to kalasiris.

* refactor(utils/hirise): Converted pysis to kalasiris.

* refactor(spatial): Converted pysis to kalasiris.

* refactor(acd_cd): Converted from pysis to kalasiris.

* refactor(conda/meta.yaml): Converted from pysis to kalasiris.

* refactor(environment.yml): Converted from pysis to kalasiris.

* refactor(notebooks): Converted from pysis to kalasiris.

* refactor(spatial/isis.py): Converted from pysis to kalasiris.

* refactor(matcher/subpixel.py): Converted from pysis to kalasiris.

* docs(AUTHORS): Added my name.

* docs(README): Added info about needing to separately install ISIS and then set ISIS environment variables in the autocnet environment.

* refactor(utils/hirise.py): Removed unused imports, added some opinionated comments.

* test(utils/hirise.py): Created tests.

* build(Makefile): Added for my own sanity, but also to help download some example products for testing.

* refactor(spatial/isis.py): Minor changes to deal with new pvl, and added tests.

* feat(spatial/isis.py): Rebuilt the three functions, normalized their input and output, and added tests.

Modules in autocnet that used these functions were altered to adapt
to
the new pattern, but they did not have tests before this change, so
it
is unknown if my changes have any other consequences.

* fix(Makefile): Don't auto-run test-resources with "make test" make more optional.

* ci(continuous_integration.yml): I love trying to debug CI via commit.

* ci(continuous_integration.yml): Fiddly YAML syntax.  You'd think I'd be used to counting spaces by now.

* ci(continuous_integration.yml): Need to count in whole document.

* ci(continuous_integration.yml): Need both HiRISE channels for tests, otherwise they skip, but at least that's working.

* fix(subpixel.py): Original code had reversed the output of the functions, but I didn't notice that, so I inadvertently un-reversed it and introduced an error.  Fixed.