Add Master Key.app version 5.6.2
user
```ruby
class MasterKey < Cask
  url 'http://macinmind.com/MasterKey.dmg'
  homepage 'http://macinmind.com/?area=app&app=masterkey&pg=info'
  version '5.6.2'
  sha256 '3b952d0e40a5bb937b4e85684e480d7fb364c17e319c1963f94e89bd382e2353'
  link 'Master Key.app'
end
```
assistant