Bump the version
Fix an issue with the read queue and basic.nack

- Handle an issue with the read queue having .task_done() called too many times
- Basic.Nack checking was checking for the wrong string, fix that
Add support for Python3 memoryviews (#50)
Python3 maybe_utf8_encode enhancements

Make sure the value that is trying to be cast to a bytes value is a string
Update version history doc [ci skip]