DC2B-36:  Apply permissions on metadata and refactor web pages.

The User permissions on metadata.
1) Admin: All
2) Data Custodian: All
3) Researcher with upload: All except delete
4) collectors: All except delete & create
5) principal investigator: All except delete & create
6) student owner: All except delete & create
7) granted users read (show, list, search & index) + download
8) all others read (show, list, search & index), + download for public dataset.