Here is a proposed workflow for managing a tuf workflow from the command line:

https://gist.github.com/lmars/13e272b5bb4195ae24c8

@titanous @heavenlyhash please comment / update if you feel anything is missing / incorrect, I plan to update #3 to support this workflow.