[Ubuntu] Add the skype icon to the notification bar in Ubuntu12.10

As we know, in Ubuntu12.10, the user interface is Unity, it is really not so conveience to use.

For example, when i installed the skype, i found i can NOT see the skype icon in the notification bar in the top of the desktop.

After googling for a while, at last i find and success to find it back.

In your terminal, run as: 

gsettings set com.canonical.Unity.Panel systray-whitelist "['JavaEmbeddedFrame', 'Wine', 'Update-notifier', 'Skype']"

Have fun with Ubuntu!