get email back from hydroshare,

update file metadata in the extractor,

most of issues doesn't influence the code or they have further plan.

some issues to discuss:

1. TODO: add folders as what is on clowder ( need to use API instead of pyclowder)
2. TODO: use clowder tags as HydroShare keyword?
3. I am using description as abstract on HydroShare, what if the dataset has abstract metadata?
4. I didn’t make the resource public/ shareable/ discoverable, because: