* src/GrampsDb/_ReadXML.py: remove commented out code
* src/Editors/_EditEvent.py: handle overwriting of date text
* src/RelLib/_DateBase.py: allow optional dropping of date text on
serialization
* src/RelLib/_Date.py: allow optional dropping of date text on
serialization
* src/RelLib/_Event.py: allow optional dropping of date text on
serialization
svn: r7306
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