Bump version
Make messages go to DLQ in plaintext; add logging
Add some comments
Use core.async to send messages to processor in IronMQ poller
Clean up tests
Merge branch 'feature/ironmq-go-reader' into develop
Add debug logging
Add with-receive-channel helper; clean up debug messages
Update docs
Allow user to configure poll sleep time
Update docs
Merge branch 'release/0.2.2'
Bump version