jetty 0.2.0

• Execute an R script in a Docker container:
  jetty now supports executing an R script in a Docker container via the
  run_script() function. A particularly important argument
  is the context argument. This user should specify this
  as the filepath to a directory that serves as the script's
  execution context. Specifically, this directory will be mounted to the
  Docker container and, as a result, this script will have access to all
  files/directories contained within the context. The script's execution will
  fail if it attempts to interact with any files/directories
  outside the provided context directory.
  Note: this is a feature that is only designed to work
  well with MacOS and Linux and will most likely crap out if used on Windows.