Add Sass cache files to the gitignore.
Added server side controllers for checking in and out a book so that doesn't have to be done by edit, this is so we can lock down the edit function but still allow anonymous users to checkout books.
Change the user update function to the callback style rather than done because done doesn't work for update at the moment.
Update the client side code to use the new checkout and checkin controllers.
Added and configured sass, open-sans and a icomoon icon font. Started theming.