Changed the post message key in order to use the same naming scheme as in MessagePack.
Adapted to changes in beam-common regarding the Carrier interfaces in order to use the MQTT topic information.
Changed interface between carrier and carriermodel in order to pass the additional information further (topic/path).
Changed interface between carrier and carriermodel in order to pass the additional information further (topic/path).
Cleaned imports.
Cleaned imports.
Added topic prefix to outgoing messages.
Added rest of code so that connection between server and client can be established and the handshake works.