* src/DdTargets.py: add family targets to target list functions
* src/Marriage.py (at_dest_drag_data_received, ev_dest_drag_data_received,
ev_source_drag_data_get, at_source_drag_data_get): fixed dnd methods and
added use of DdTarget types.
* src/plugins/ScratchPad.py (generate_family_event_tooltip,
generate_family_event_tooltip, redraw_object_list): added support for
family events and attributes.
svn: r4249
* src/Sources.py: converted to use DdTargets.py
* src/FamilyView.py: converted to use DdTargets.py
* src/EditPerson.py: converted to use DdTargets.py
* src/EditPlace.py: converted to use DdTargets.py
* src/Marriage.py: converted to use DdTargets.py
* src/DdTargets.py: added targets for FAMILY_EVENT, FAMILY_ATTRIBUTE,
CHILD and SPOUSE
svn: r4236
* src/DdTargets.py: new module to manage drag and drop target data.
* src/Makefile.am: added DdTargets.py
* src/ScratchPad.py: modified to use DdTargets.py. This is the first
stage. I will look at modifying EditPersons.py to use DdTargets.py next
svn: r4231
