Functional widget for ribbon

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11477 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Add renderer for ribbongroup

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11480 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Fixed wrong method usage

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@11481 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c