* Allow explicit inclusion of session tags in the SDK, enabling the
      resending of tags bundled with messages that would not otherwise
      be ACKed.
    * Don't force mode=guaranteed for end to end delivery - if mode=bestEffort
      no DeliveryStatusMessage will be bundled (and as such, client apps using
      it will need to do their own session tag ack/nack).
    * Handle client errors when notifying them of message availability.
    * New StreamSinkSend which sends a file to a destination and disconnects.
    * Update the I2PSocketManagerFactory to build the specific
      I2PSocketManager instance based on the "i2p.streaming.manager" property,
      containing the class name of the I2PSocketManager implementation to instantiate.