added UI for SOCKS settings.
added SOCKS4/5 proxy support.
leave messages on POP3 server for 7 days by default.
added new account option 'Put signature before quote (not recommended)'.
implemented the automatic filtering of IMAP4 INBOX folder.
added the option to input signature directly.
save temporary IMAP4 password. Don't try to connect to IMAP4 server when closing folder.
implemented clearing of IMAP4 message caches on exit.
added an option to update only INBOX on checking new messages of IMAP4 accounts.
enabled custom queue folder.
changed the license of LibSylph from GPL to LGPL.
save GPG settings even if GPGME is disabled.
moved more modules to libsylph.
separated some enums to reduce dependency.
more code cleanups.
separated UI code from prefs_common.c and prefs_account.c.
separated UI code from prefs.c.
fixed gcc-4.0 warnings.
made the order of buttons comply with GNOME HIG.
moved the option of max news articles to account prefs.
added an option to encrypt when replying to encrypted message.
added PGP Sign/Encrypt check button on the compose window.
implemented PLAIN authentication method for SMTP AUTH.
replaced intl.h with glib/gi18n.h.
made the font size of supplementary explanations of config dialogs smaller.
implemented the migration of configuration.
automatically take over older config files.
Initial import of Sylpheed (GTK2 version).