added 'Junk' special folder and automatically create it when not exist.
use case insensitive match on Win32 when checking existent folders to prohibit multiple reference of folder.
added 'In addressbook' to the quick search menu.
added 'Last 7 days' to the quick search.
add a new flag: RemoteFolder::remove_cache_on_destroy.
update summary caches on receiving.
merged plugin-test branch into trunk.
fixed a bug that virtual folders were not sorted properly.
modified the method of getting IMAP4 folder list.
qsearch_cond_type now persists between sessions.
the quick search condition now persists for the whole session.
win32: fixed a bug that the path separator of FolderItem::path was not processed correctly.
fixes data format incompatibility of folderlist.xml between Unix and Win32.
implemented the automatic filtering of IMAP4 INBOX folder.
added 2 Folder API.
added the option 'Remember last selected message'.
use filename-safe string for IMAP cache directory.
implemented query search and virtual folder (merged from newsearch branch).
folder_find_item_from_identifier(): also return top folder.
enabled the property of the top folder.
fixed rename on win32.
changed the license of LibSylph from GPL to LGPL.
added 'View/Sort/by thread date'.
moved more modules to libsylph.
directory separator fix.
modified directories for Windows convention.
implemented folder move.
fixed Turkish locale problem.
optimized the writing of mark file.
optimized writing summary cache.
reimplemented folder view with GtkTreeView.
replaced intl.h with glib/gi18n.h.
added constant C_INTERNAL and CS_INTERNAL.
implemented the migration of configuration.
automatically take over older config files.
Initial import of Sylpheed (GTK2 version).