This will list some resources as being both a file yet also may be acted
upon as a directory. For instance, a zip file or an ISO, in this case,
may be a 'traversable' object.

We could even extend this to files within objects or embedded inside
resources but "promoting" a file to be a resource when it matches a
mime type. That could be interesting... to reuse the resource plugins to
traverse those types of files wherever they are.

Moves object manager stuff out of the Workflow object in the
workflow component. Yuck.

Fixes issue where jobs were being generated incorrectly.

Updates testing harness to output JSON.