more of 3.0.0 complete

- Added file writers for items (with meta!) and books
- finalized concept of sending:
Book title: [Pp]ackage
First page contains all other details:
- (package|title): <new book title>
- to: <recipient>
- item: <itemDisplayName>
I don't care if people try to mess it up, will just automatically unsign
the book on failed sending.