Re-exported types from sub-modules to a crate level. Made most of the internals private. Made public only necessary things.
Upgrading, in most cases requires removing preceding module name before struct:
use amqp::session::Session;
use amqp::basic::Basic;
use amqp::channel::Channel;will become something like:
use amqp::{Session, Basic, Channel};The only things where you still use modules of are protocol and table.