medwards/free-library-on-rails — pull request #24 by wvengen (2014-11-10 22:28:37+00:00)
Title: Allow librarians to edit all books.

Not all members have either the motivation or the understanding to fill in all book details. That's why I've introduced the concept of librarians, who can edit all books. Librarians can make other members a librarian, and each librarian can give up his librarian-ship by himself.