Add use cases 47 (visualize Workflow) and 48 (Visualize Run).  The former describes how a scientist will be able to view a graph of the workflow (prescriptive provenance) expressed in the standardized inline comments extracted from the script.  The latter describes viewing a graph of the runtime provenance of an executed script, based on information captured during the run and from the standardized inline comments.
Update the use case names for 47 and 48.
Add in the sequence and use-case images for 47 and 48.
Commit regenerated use case images. Seems like plantuml changes images even though nothing of substance has changed in the markup.