Querying ProfileConnection#digital_object_ids

I am wanting to allow "digital-object-ids" as part of the query
parameters for connecting an Orcid profile.

In talking with people from orcid.org it was suggested that looking up
profiles is best done via Email and DOIs.

See for available parameters:
http://support.orcid.org/knowledgebase/articles/132354-tutorial-searching-with-the-api

@TODO - It would be nice to properly label these.

@ASIDE - I updated .hound.yml to reflect how I want it parsed.