You are free to use, share, modify and do whatever you want with this package or any part of it in any personal, open-source or commercial work without obligation of payment (monetary or otherwise) or attribution. You even can host the set. As I want it to be open as it can be, the only thing you are not allowed to do is SELLING or RENTING the package (either in existing or modified form). Let's keep the web as open-source as we can :)