this should make future debugging sessions easier, telling us what bugs were or were not fixed at the time of an incident.
added a test to make sure data file can be read/written, and at a minimum, sets global data-version.
also clean up test framework a bit, and introduce a helpful macro.
This is not actually recommended, but your system may not have
this,and you should still be able to contribute. also, libxml2 is on
the way out, I am beginning to really hate it.
Moving a couple of files around.