Implement clock sampling and synchronisation.
Implement AppUnicast message handler.
Enforce event-vote time offsets.
Correctly handle events with duplicate identifier triples.
Remove obsolete TODO.
Prevent nodes from casting duplicate Vote messages.
Drop the dynamic-methods code.

Definitely not going to be used anywhere.
Discard hlmsgs containing unprocessible chmods.
Implement node visibility thresholds.
Minify hash in HtRangeNext messages.
Improve initial disposition logic for new nodes.
Fix not setting instant on hash-tree objects.
Fix minor documentation issues in messages.asn1.

Also reduce maximum size of application-defined data so that it actually
fits in hlmsg segments.