Accesssion API v1: details

Accession API v1 /{uuid} or /{doi} return accession information.

Add new endpoints /details/{uuid} and /details/{doi} that return the following JSON:

{
 "details": accession,
 "pdci": acession.accessionId.pdci,
 "datasets": ...,
 "subsets": ...
}

• datasets: includes List of basic information of Datasets where accession is described (use JsonView.Minimal)
• subsets: includes List of basic infomration of Subsets where accession is included (use JsonView.Minimal)

Some service methods may not yet be available (check with @mborodenko).