Hello world in Grails and Vaadin

Download and install Eclipse STS and install the extensions. 

1. Create new Grails project
   
2. Fill in the name of the new project
   
3. Try to run the application. The plain Grails application (without Vaadin) should start straight away without any additional configuration.
   
4. This is how the started application should look like. 
5. Install Vaadin plugin. This command will install the latest version of the plugin.
   
6. Try to run the application (on this screen I have added option where I run the application on different port... it might be handy for you).
   
7. Add Vaadin folder into the source folder list.
   
8. Try to run the application again. You will see the Vaadin hello world.
   
9. We are done. 

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