0.006
    - Change 'host' attribute to 'hostname' to match other
      inputs and outputs.

0.005
    - Depend on Message::Passing 0.007 for the Decoder
      pass-through changes, so you no longer have to say
      --decoder Null

0.004
    - More doc improvements

    - Ability to subscribe to a subset of event types

0.003
    - Fix docs

0.002
    - Rename

0.001
    - Initial version