* src/DateEdit.py: use global date displayer/parser

* src/DateHandler.py: provide global date displayer/parser
instead of having a bunch of different classes have their
own handler that needs to be updated with the handlers change.
* src/EditPerson.py: use global date displayer/parser
* src/EventEdit.py: use global date displayer/parser
* src/FamilyView.py: use global date displayer/parser
* src/GenericFilter.py: use global date displayer/parser
* src/GrampsCfg.py: remove unused statements
* src/ImageSelect.py: use global date displayer/parser
* src/Marriage.py: use global date displayer/parser
* src/ReadXML.py: use global date displayer/parser
* src/RelLib.py: don't require get_display_info, eliminate
needed for importing const and GrampsCfg
* src/SelectChild.py: don't require get_display_info
* src/Sources.py: use global date displayer/parser
* src/plugins/RelCalc.py: don't require get_display_info


svn: r3841

src/GrampsCfg.py

@@ -112,7 +112,6 @@ def get_toolbar_style():
 def set_calendar_date_format():
     format_list = DateHandler.get_date_formats()
     DateHandler.set_format(GrampsGconfKeys.get_date_format(format_list))
-    RelLib.display.set_format(GrampsGconfKeys.get_date_format(format_list))
 
 #-------------------------------------------------------------------------
 #
@@ -279,7 +278,6 @@ class GrampsPreferences:
 
         lastnamegen_obj = self.top.get_widget("lastnamegen")
         menu = gtk.Menu()
-        choice = 0
         for index in range(0,len(_surname_styles)):
             name = _surname_styles[index]
             item = gtk.MenuItem(name)