Add a cask for Balsamiq Mockups
user
```ruby
class BalsamiqMockups < Cask
  url 'http://builds.balsamiq.com/b/mockups-desktop/MockupsForDesktop.dmg'
  homepage 'http://balsamiq.com/'
  version 'latest'
  no_checksum
  link 'Balsamiq Mockups.app'
end
```
assistant