Dialog Framework refactor

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9346 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c
Add params support to dialog framework, to pass params to dialog.

git-svn-id: http://primefaces.googlecode.com/svn/primefaces/trunk@9348 5a70e874-a5cb-11dd-8af2-493fb0bb9f7c