Add a book controller and various amenities to Diviner's live view

Summary: Ref T988. Mostly backend changes, with a very rough frontend on top of them. See Conpherence discussion.

Test Plan: {F45010}

Reviewers: btrahan, chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T988

Differential Revision: https://secure.phabricator.com/D6113