liferay-plugin-package.properties in demo WAR refers to vaadin-ipc-for-liferay-0.9.1.jar, you need to change it to vaadin-ipc-for-liferay-1.0.0.jar to get demo to work
liferay-plugin-package.properties in demo WAR refers to vaadin-ipc-for-liferay-0.9.1.jar, you need to change it to vaadin-ipc-for-liferay-1.0.0.jar to get demo to work