Fixing a regression introduced by that PR (which made [dev] plt stage require root privileges in the PlanktoScope OS setup scripts by adding image-caching functionality to that subcommand)
Fixing incorrect usage instructions for the --parallel flag in various places
Adding a missing --parallel flag to stage cache-img
This PR follows up on #178 by:
[dev] plt stagerequire root privileges in the PlanktoScope OS setup scripts by adding image-caching functionality to that subcommand)--parallelflag in various places--parallelflag tostage cache-img