This an optional companion package to planemo which provides provides
an additional entry point under the alias "cwl-runner", which is the
implementation-agnostic name for the default CWL interpreter installed
on a host.

This package is based on the CWL reference implementation package of
the same name, see
https://github.com/common-workflow-language/cwltool/tree/master/cwl-runner
for more information.
