Adds Single Use Spellbooks and the Spellbook Bundle

Created by: Arthurdentist

This PR adds single use spell books for every spell that didn't already have a spell book.

The PR also adds a new option for wizards, 'Spellbook Bundle' This bundle can be purchased for five spell points. In return you will get a bundle containing seven random single use spell books. You wont know what spells you will get and once you've bought the bundle it cannot be refunded!

The seven spell number is up for debate but it seemed like an appropriate base line for me. Tell me if you think it is too high or too low. All suggestions are appreciated as always.