This marks start of actual work on this fundamental task.
Extensive planning from 2016 is available, together with an almost
complete diff binding for the entities involved into timeline display.
This changeset fixes a huge pile of problems, as indicated in the
error log of the Doxygen run after merging all the recent Doxygen improvements
unfortunately, auto-linking does still not work at various places.
There is no clear indication what might be the problem.
Possibly the rather unstable Sqlite support in this Doxygen version
is the cause. Anyway, needs to be investigated further.
this is a tricky problem and a tough decision.
After quite some pondering I choose to enforce mandatory fields
through the ctor, and not to allow myself cheating my way around it
these are just empty class files, but writing a basic description
for each made me flesh out a lot of organisational aspects of what
I am about to build now
