Enable CWL Workflows to Specify Tools by "ID".

[jmchilton]

This abstract separation between workflows and tools that is available in Galaxy is not available in CWL. Everything must be URI based in CWL and paths may vary from distribution to distribution - we need to reference abstract tool IDs in high quality Galaxy workflows I believe.

[tetron]

You can use URIs which are abstract tool IDs, you just need to provide the necessary hooks to resolve them via a custom "Fetcher" class.