include gtk/gtk.h as a workaround for GTK+ >= 2.13.3.
win32: made a workaround for the redraw problem in GTK+ 2.10.11.
src/editaddress.c: removed unused code, and set window position to center on parent.
improved the layout of the edit group dialog.
improved the behavior of edit group dialog.
modified the spacing of the statusbar of address book.
fixed crash bug when an address in a group was modified. Fixed memory leaks.
made the order of buttons comply with GNOME HIG.
fixed Turkish locale problem.
reimplemented summary view with GtkTreeView.
replaced intl.h with glib/gi18n.h.
use GTK stock button for button set.
Initial import of Sylpheed (GTK2 version).