create a minimalist application for the desktop notification area

[vhamon]

• application has a desktop notification area icon (aka systray)
• icon has a menu
• icon shows important notifications
• uses the JSON-RPC
• on linux, systray application can launch the default browser on armadito web server using: xdg-open http://localhost:8888/app/index.html sensible-browser instead of xdg-open

[fdechelle]

menu items:

• Armadito version x.y.z
• Latest bases update: 01/01/1970 00:00
• separator
• Open Armadito web interface
• Pause real-time protection
• separator
• Latest threats ???