new version of this plugin

changelog for this version
- add all api calls of Easymarketing, no manuell settings are required now
- add retargeting provider AdScale
- add lead tracker
- add new fields for the product api call
- add api for getting the shopsystem infos
- add new tab `overview`to see the status of all settings
- update gui for settings with more setting options
- fix problems with the google conversion tracker