Basic demo for grid css

git-svn-id: http://primefaces.googlecode.com/svn/showcase/trunk@11659 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Demo update

git-svn-id: http://primefaces.googlecode.com/svn/showcase/trunk@11660 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c