Added shutdown informational messages.

New application for I2P: desktopgui. Should eventually replace systray, and have more functionality.

To use the application, you need to (by default) add the following to clients.config :
# desktopgui
clientApp.6.args=
clientApp.6.delay=5
clientApp.6.main=desktopgui.Main
clientApp.6.name=desktopgui
clientApp.6.startOnLoad=true