Support for moving files in Data Service

Issue was raised during microbiome meeting today about how when files are moved locally, ddsclient uploads a new copy (but does not delete the old one)

I recall in the design of ddsclient that we discussed how to notice file moves and that ddsclient is not a sync client. However, since real-world use does involve re-organizing directories, we should consider how to improve this case.

I think first, we could provide SDK support for [PUT /api/v1/files/:id/move](https://api.dataservice.duke.edu/apiexplorer#!/files/putApiV1FilesIdMove)

Second, we could add a move command to the command-line to call this endpoint
Third, we could re-visit how to detect local filesystem moves and apply them remotely.