Small change to allow users to call disdat.entrypoints.docker_ep with a custom `cmd` array
0.9.15
1.) For Disdat-Luigi tasks: do not exec git if env variables describing git repo information exist 2.) Use setuptools_scm for versioning 3.) Place all entrypoints (cli and docker) in one place in repo, enabling users to easily call the Disdat entrypoint if they do not use the Disdat dockerizer.