Client side validation support for commandLink.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9843 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Add globalSelector option.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9845 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c