Skype provide deb file in their Download page but it does not work 100% on Ubuntu 14.04.
It does all features as expected but the icon on status bar is not display. We can check if there is new message by looking at the icon on Launcher but it is not comfortable as on Status bar with small marker of unread messages.
By installing "sni-qt:i386" will bring it back
sudo apt-get install sni-qt:i386