Better UI for fileupload validation messages, used p:messages ui and added customizable messageTemplate format.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9548 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Implemented fileLimit restriction for fileupload in addition to size limit and file types.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9549 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c