Add a cask for Apptivate.app, 2.1 (12)
user
```ruby
class Apptivate < Cask
  url 'http://www.apptivateapp.com/resources/Apptivate.app.zip'
  homepage 'http://www.apptivateapp.com'
  version '2.1_12'
  sha1 '6135ba88e2aa3b6141c6a2a76cd4142518ba35fc'
  link 'Apptivate.app'
end
```
assistant