Scope: Initial release. Coverage of core use cases: run, pull, rm, images actions. Subset of command flags.
Scope: Build support via Docker2Singularity in the TACC Reactors service. Support for Singularity's shell convenience in docker runtime.
Bash prototype replaced with Py3 implementation. System calls to docker replaced with docker-py. Configurable via YML file(s) over ENV variables.