Add Beyond Compare 4 Beta
user
```ruby
class BeyondCompare4Beta < Cask
  url 'http://www.scootersoftware.com/BCompareOSX-4.0.0.17451.zip'
  homepage 'http://www.scootersoftware.com/beta.php'
  version '4.0.0.17451'
  sha1 'ae61d7c9e555d05cce3fca1cd00f98d9785af942'
  link 'Beyond Compare.app'
end
```
assistant