enabled sorting of the result of query search.
renamed summary_search to query_search.
exclude trash on recursive search.
partially implemented search folder properties.
accept when name entry is activated on the save search dialog.
added a function for minor code cleanup.
cache search result to speed up on and after the second search.
modified window handling.
select activated message on search dialog in summary view if possible.
some modification of searching.
removed SummaryView* from the argument of summary_search(). Preset folder when saving as search folder.
implemented query search and virtual folder (merged from newsearch branch).
modified the order of search buttons.
made the order of buttons comply with GNOME HIG.
improved the interface of summary search.
reimplemented summary search.
reimplemented summary view with GtkTreeView.
replaced intl.h with glib/gi18n.h.
use GTK stock button for alertpanel.
use GTK stock button for button set.
Initial import of Sylpheed (GTK2 version).