Library feature

Add basic functionality for the DUCSS library to be featured on the website. Styling needs major feedback and feature requests are welcome. Needs review by @Specialkbyte and @houli
It doesn't have to be an M2M relationship but the CSV file I have for the books does have multiple authors. I would also like to eventually add a feature where you click on an authors name and see all of their books that we have. As a lot of our books have multiple authors (Especially Martin Fowler books) I thought an M2M relationship might be the best approach.