fixed crash on csv import.
include gtk/gtk.h as a workaround for GTK+ >= 2.13.3.
fixed address completion.
fixed another format string bug in address completion.
insert address only if shift or control key is pressed when accepting completion.
improved address completion.
prevent warnings when ESC, BS etc. is pressed at address completion.
removed mbs/wcs functions which are no longer required.
fixed gcc-4.0 warnings.
replaced intl.h with glib/gi18n.h.
Initial import of Sylpheed (GTK2 version).