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).