Styles count for views and downloads, refs #9672
Adds an ORCID field to the user model.

Includes the official ORCID icon asset, some partial cleanup, a validator, a database migration, and changes to the generators.
Merge pull request #733 from projecthydra/add_simple_orcid_support

Adds an ORCID field to the user model.
Merge pull request #788 from psu-stewardship/downloads-style

Styles count for views and downloads, refs #9672