Add Cask for Sickbeard version 13.05.25
user
```ruby
class Sickbeard < Cask
  url 'http://sickbeard.lad1337.de/download.php?f=SickBeard-OSX-master-13.05.25.dmg'
  homepage 'http://sickbeard.lad1337.de/'
  version '13.05.25'
  sha1 '830fafa783858cd6636ce0177d246804e0d1adf7'
  link 'SickBeard.app'
end
```
assistant