Convert returned values of exchange.* functions
Continue test suite clean up
Continue test suite clean up
Convert returned values for channel.* operations
langohr.core cleanup
Documentation cleanup
basic.* cleanup
Make langohr.confirm/add-listener return a channel

Consistent with langohr.core/add-return-listener and makes much more sense
since it enables the function to be used with the threading macro (->)
that thread channels.
Convert return values of confirm.* operations
Convert return values of tx.* operations
Cosmetics
Change log updates
1.0.0-beta12
Now working on beta13-SNAPSHOT