Add a cask-file for PhpStorm
user
```ruby
class Phpstorm < Cask
  url 'http://download.jetbrains.com/webide/PhpStorm-6.0.2.dmg'
  homepage 'http://www.jetbrains.com/phpstorm/'
  version '6.0.2'
  sha1 'e138da2d19c89f391d1a6adcaef052ecedb88a97'
  link 'PhpStorm.app'
end
```
assistant