More modular

Updated readme and merged missing changes from 3.1.1 (stair face
direction bugfix)
Added /book copy and respective permissions.
Moved presses to own package; they can now be disabled.
Moved some methods from PrintingPress to Functions because of new copy
command.
Removed compiled BookSuite.jar: I had not updated it since 2.1.4, and
this repo is for active development, not release.