[Carlos] PriceManager now accepts sets of books
[Carlos] PriceManager now accepts sets of books
[Carlos] Added book set manager, which determines the sets of books
[Carlos] Added book set manager, which determines the sets of books
[Carlos] Moved the file to the lib folder to comply with the convention.
[Carlos] Changed require_relative to require
[Carlos] PriceManager now supports sets of books
[Carlos] PriceManager now supports sets of books
Merge branch 'master' of https://github.com/rsliter/bookstore

Conflicts: