- Update to version 1.7.1
* Fixed an issue where a truncated or corrupted ICAO APDU could
cause a crash in ASN.1 decoder.
* Fixed an issue where NULL characters in XID attribute values
could cause them do be printed partially. Any non-printable
characters in octet strings printed as text are now replaced
with periods.

- Update to version 1.7.0
* Complete overhaul of output generation code.
* Significant enhancements to CLNP, COTP and IDRP decoders.
Most if not all protocol headers are now decoded and included
in the output.
* Added a decoder for X.225 Session Protocol SPDUs.
* Added a decoder for VDL SNDCF error reports.
* XID: improved decoding of XID sequencing, Frequency support
and System mask attributes.
* X.25: improved decoding of facility fields, call clearing
causes and diagnostic codes.
* Minor bug fixes.