Add Cask for Sbooth's Tag
user
```ruby
class Tag < Cask
  url 'http://downloads.sourceforge.net/sourceforge/tagosx/Tag-0.4.1.zip'
  homepage 'http://sbooth.org/Tag/'
  version 'latest'
  no_checksum
  link 'Tag-0.4.1/Tag.app'
end
```
assistant