Add Wacom Graphire4 legacy drivers
user
```ruby
cask :v1 => 'wacom-graphire4-tablet' do
  version '5.3.0-3'
  sha256 '0299398282cf86d56bd8f0701ef9c3140e901b8ea72ec6821a00871acdd25e76'

  url "http://cdn.wacom.com/U/Drivers/Mac/Consumer/#{version.sub(%r{-.*},'').gsub('.','')}/PenTablet_#{version}.dmg"
  name 'Graphire4 (CTE) Legacy Driver'
  homepage 'http://us.wacom.com/en/support/legacy-drivers/'
  license :gratis

  pkg 'Install Bamboo.pkg'

  uninstall :launchctl => 'com.wacom.pentablet',
            :quit => [
                      'com.wacom.TabletDriver',
                      'com.wacom.PenTabletDriver',
                      'com.wacom.ConsumerTouchDriver'
                     ],
           :pkgutil => 'com.wacom.installpentablet'
end
```
assistant