Text changes for #345.

Fixes for #311, #345.

Get rid of custom Shib code & revert to generic Omniauth for everything. Modify identifier_schemes table to add scheme specific urls.

added a initialization helper to assist with omniauth provider registration. Added a remove.png image for disconnecting providers from user accounts

Had to remove code that was building devise omniauth connections dynamically. The timing of when the rails engine builds the routes and the models is not conducive to this approach

added in locale entries for identifier schemes

Updated routes to check for the existence of the new identifier_schemes table because rake db:migrate initializes the Rails app and devise tries to make use of the new table

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