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.
modified the spacing of the statusbar of address book.
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).