implemented new message notification popup window.
removed includedir from include path in Makefiles.
possible fix for gmodule link error on some environments (#74). Updated copyright year.
fixed compilation error with Fink + OS X (Bug #42).
added marshaller for plug-in library. made 3.1.0rc.
made 3.0.0beta3 release.
added -version-info to libtool.
merged plugin-test branch into trunk.
implemented remote POP3 mailbox.
implemented vertical view. Separated quick search into another module.
don't enable windres on non-win32 platforms.
implemented CSV import (in progress).
implemented the toolbar customization dialog.
implemented SSL certificate dialog.
initial implementation of new printing using GtkPrintOperation.
generate sylpheed.rc from sylpheed.rc.in.
renamed summary_search to query_search.
partially implemented search folder properties.
win32: added program icon.
match the output header for printing to the message view.
reimplemented grouplistdialog with GtkTreeView.
moved mbox.[ch] into libsylph.
moved more modules to libsylph.
moved recv.[ch] to libsylph.
moved html.[ch] to libsylph.
separated UI code from account.c.
separated some enums to reduce dependency.
separated UI code from prefs_common.c and prefs_account.c.
made some core modules library (libsylph).
separated UI code from prefs.c.
separated trayicon into another module, and notify new messages with trayicon on receive.
initial implementation of the tray icon.
renamed src/pixmaps to src/icons.
removed unused xpm files.
replaced pixmaps icons with png images.
replaced intl.h with glib/gi18n.h.
prefs_filter_edit.c: use GTK stock icon for add and remove button.
removed unnecessary stock icons.
Initial import of Sylpheed (GTK2 version).