Track Vaadin application use with Google Analytics
Vaadin version compatibility:
- Since version 2.1.0 (Vaadin 7) Universal Analytics (analytics.js) is the default.
- Since version 2.2.0 event and user-id tracking was added
- Since version 2.2.0 project structure changed
Changed the minimum Vaadin version to 10.0.19. Thanks @jcgueriaud1 for updates.