Added tests for the new omniauth functionality

Removed logo from identifier_schemes db table and added it to yaml locales. Added more entries for to the locales for oauth. Added red 'x' removal link for oauths on profile page. updated registrations controller so that users hitting the oauth handler that are not already signed in are brought to a registration page with a new user record that is connected to the oauth identifier

added additional locale message for identifier schemes and a remove icon

setup dynamic omniauth provider structures and tied it into devise

Added a new identifier_schemes table and corresponding user_identifiers join table. Added the initial ORCID identifier scheme to the seeds.db file. Updated the locales file to include corresponding identifier tooltip language, logos, and initial connection message. Updated user profile page to dynamically display identifiers