Stephen Evanchik's Move GNCDateFormat to GLib patch.

[Derek Atkins]

Log Message:
-----------
Stephen Evanchik's Move GNCDateFormat to GLib patch.

        * src/gnome-utils/gnc-date-format.h:
          Added #include <glib.h>
          Added private member 'disposed' to GncDenseCal struct
          Added GNC_TYPE_DATE_FORMAT macro
        * src/gnome-utils/gnc-date-format.c:
          Converted the following functions to use GObject:
                gnc_date_format_get_type,
                gnc_date_format_class_init
          Created gnc_date_format_dipose function

Tags:
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gnucash-gnome2-dev

Modified Files:
--------------
    gnucash:
        ChangeLog
    gnucash/src/gnome-utils:
        gnc-date-format.c
        gnc-date-format.h