- create a MVC portlet project
- new liferay Vaadin portlet on the project then finish
there will appear a dialog and click continue
notice: there will have errors no the project because the project doesn't have "vaadin.jar"
1. notice there is no vaadin.jar in liferay-plugin-package.properties file as the portal dependency jars
2. showing errors in NewVaadinPortletApplication.java since it doesn't import the right files,
it should import the following files:
3. after new vaadin project, go to Souce tab of liferay-plugin-package.properties file, notice that there is an blank line generated before "portal-dependency-jars=vaadin.jar"