Make the frontend work for merging identities
-create datalist in person.html, changed urls and views so will merge identities with a POST
Change import commands to set the new fields being used for merging identities
-migrate-upload-data creates uploads with original_email and updates email_changer on new uploads for nonauthoritative people
-change People.get_or_create to include original_email
-Added logic to ensure that if someone is an debian dev they cannot unbecome one