python objects, so that Gramps classes are never pickled.
* Date.py, CalSdn.py: Move to RelLib.
* src/dates/Date_*.py: Use new Date.
* src/plugins/*.py: Use new Date.
* src/GrampsDb/_*.py: Use new Date, new unserialize.
* src/*.py: Use new Date.
svn: r5875
* doc/grampsxml.rng: Events preceed people.
* src/GrampsDb/_WriteXML.py: Events preceed people.
* src/GrampsDb/_ReadXML.py: Parse old and new style events, old
witnesses, new eventrefs.
svn: r5853
* src/GrampsDb/_GrampsBSDDB.py: More XML export fixes.
* src/GrampsDb/_GrampsDbBase.py: More XML export fixes.
* src/GrampsDb/_GrampsInMemDB.py: More XML export fixes.
* src/GrampsDb/_WriteXML.py: More XML export fixes.
svn: r5842
* src/GrampsDb/Makefile.am: Ship new file.
* src/GrampsDb/_GrampsBSDDB.py: Convert family and parent family
relations from integer to tuple on upgrade.
* src/GrampsDb/_WriteGedcom.py: Convert from tuple to string.
svn: r5839