renamed variable 'interface' to 'iface'.
src/addressadd.c: removed warnings about xpm.
src/addressadd.c: translate 'Auto-registered address' book.
implemented auto-registration of new recipients.
added new search folder icon.
win32: made a workaround for the redraw problem in GTK+ 2.10.11.
removed statusbar from add-address dialog.
made the window position of the add-address dialog at the center of parent window.
modified the spacing of the statusbar of address book.
added 'Add to address book' to the context menu of textview.
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).