New Cask: Pandora One Desktop App 2.0.8

With the Pandora Desktop Application, you can play your Pandora
stations right from your desktop – without opening a new browser
window. Plus, because the desktop app is only available as part of
Pandora One, your music is completely free of all advertising.
Merge pull request #3419 from vmrob/pandora-one

New Cask: Pandora One Desktop App 2.0.8