• Allow reading raw frames or I/Q data from standard input. To enable this,
  specify "-" as the argument to --iq-file or --raw-frames-file option,
  respectively.
• Added --prettify-json command line option which enables prettification of
  JSON payloads in libacars >= 2.2.0. This currently applies to OHMA messages
  only.
• Fixed incompatibility with libacars 2.2.0 which might cause a crash during
  reassembly of CLNP packets.