Add new cask for Kobito
user
```ruby
class Kobito < Cask
  url 'http://kobito.qiita.com/download/Kobito_v1.8.2.zip'
  homepage 'http://kobito.qiita.com/'
  version '1.8.2'
  sha1 'eac47edd574380391044ea89486b14a0ec2b3a00'
  link 'Kobito.app'
end
```
assistant